Preschool Science - Christian Parent

Archive for the ‘Preschool Science’ Category

Science for Kids: How to Make an Egg Float in Water


This is a fun, easy science experiment for kids. Have your child place an egg in a glass of water and see what happens. The egg will sink (if it is a fresh egg it will sink, a “bad” egg will actually float in water!).

egg experimentIn this experiment you will show your child that you can actually make an egg float in water by adding salt to the water. For this experiment you will need:

  • Tall glass
  • Egg
  • Table salt

Have your child place about 6 tablespoons of table salt in the bottom of a glass. Gently pour at least a cup (depending on the size of the glass) of hot water into the glass. Don’t stir it.

Next place the egg in the glass and watch it float! If the egg is not floating, just add some more salt to the glass. If the salt stays at the bottom of the glass the egg will actually float in the middle of the glass. If you stir the salt into the water, the egg will float at the top of the water.

Why does this work? Salt water is more dense or “heavier” than regular tap water, which makes it easier for the egg to float in the water. Did you know that you can actually float more easily in salty ocean water than in a lake?

To further experiment, try placing another object in the glass, such as a marble. Discuss why the egg is floating and the marble does not, even with the salt in the glass.

Copyright 2014, This article may not be reprinted.

5 Fun Magnet Experiments for Kids

by Jared Reese

Whether you are homeschooling your children or just looking for some educational science activities to do with your kids, then you will love these fun magnet science experiments. You can find inexpensive magnet kits for all of these projects both in stores and online.

"I Spy" Magnet Experiment

This experiment is fun for preschoolers or any child who is just learning about what magnets are and what they do.

magnet experimentIf you are familiar with "I Spy" books, you know that the child is shown a page of a variety of different objects and then they are asked to identify specific objects on the page.

This activity is similar to "I Spy" in that you will set up a plastic bin full of small "I Spy" type items, like small rubber balls, paper clips, toy cars, washers, small erasers, etc. Make sure that some of the objects are metal and that some are not.

Give your child a large magnet and have them use the magnet to see which items are magnetic and which are not. Help your child record their observations on a piece of paper.

Pipe Cleaner Magnet Bottle

This is a fun activity for children of all ages. For this experiment you will need pipe cleaners of a variety of colors, a plastic bottle such as an empty water or soda bottle, and a large magnet.

Help your child cut the pipe cleaners into pieces approximately one inch long. Place the pipe cleaner pieces into the bottle, filling the bottle approximately half full. Place the lid back on the bottle.

Have your child move the magnet around on the outside of the bottle to move the pieces of pipe cleaner around. Your child will have fun watching the pieces move around and arranging them into different shapes and designs.

Magnets and Water

Fill a glass half full of water and place several small metal objects in the glass.

Give your child a magnet and let them try to get the items out of the glass by placing the magnet on the outside of the glass. Have them try placing the magnet in different positions so that they can see which works best.

Magnet Jumping

Metal items will actually "jump" to make contact with a magnet that is slowly brought closer and closer to the object.

Have your child set out a variety of metal objects such as paper clips and magnetic marbles.

For this activity it works best to use a magnetic wand type magnet.

Line the objects up and have your child slowly bring the magnetic wand closer and closer to the first metal object until it "jumps" toward the magnet. Help your child measure to see how far the object jumped.

Test each of the metal items and see which item jumps the furthest.

Magnetic Painting

This is a really fun science project that can also double as an art project.

For this activity you will need a small shallow plastic tub, water based craft paints, white paper for painting on, magnetic marbles, and a magnet.

Have your child put on an apron because this painting activity can get kind of messy.

Place the piece of paper inside the plastic tub. Place several different colors of paint on the piece of paper.

Set several magnetic marbles in the paint on the paper.

Have your child place the magnet underneath the plastic tub and move the magnet around to move the magnetic marbles around inside the tub. The movement of the marbles will create designs in the paint. You may have to help hold the tub so that the tub does not fall while the child is holding the magnet under it.

These are just a few of many fun science activities you can do with your children to teach them about magnets. Show your children that learning can be fun and enjoy the benefit of spending some quality time with them at the same time.

Jared Reese is a professional blogger that provides information on industrial magnets. He writes for CMS Magnetics, where you can find the best magnets for sale online.

How to Blow Up a Balloon with Baking Soda and Vinegar


Kids love to do hands-on science experiments. My boys and I are doing different experiments with baking soda and vinegar. This experiment involves blowing up a balloon with the gas resulting from the reaction of the baking soda and vinegar. Kids of all ages will love doing this experiment. We have even included a YouTube video so you can see our experiment in action. To do this project you will need:

  • Water bottle
  • Baking soda
  • Vinegar
  • Balloon
  • Funnel

You can do this experiment with larger two-liter bottles too, but we used a smaller water bottle so that we would not need to use extra baking soda and vinegar.

With the small bottle you will only need about a cup of vinegar. First use the funnel to pour about a cup of white vinegar into the water bottle.

Next place the funnel in the open end of the balloon and slowly pour about 2 teaspoons of baking soda into the balloon.

Place the open end of the balloon over the opening of the water bottle. After the balloon is attached to the bottle, raise up the balloon until the baking soda falls down into the bottle.

As the baking soda reacts with the vinegar, carbon dioxide gas will form, filling the balloon and blowing it up. I love the reaction of my boys in the video when they thought the balloon was going to burst (you will have to watch the video to see what happened!).

This was a really fun experiment and I hope you have fun doing it with your kids too.

Copyright 2014, This article may not be reprinted.

Digging for Dinosaurs

If you are looking for a fun activity to do with your kids to beat the summer heat, then have them dig through ice for dinosaurs. When I first saw this idea I knew I had to try it with my boys this summer.

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For this project you will need:

  • A shallow plastic tub or container
  • Food coloring
  • Small plastic dinosaurs
  • Small hammers

You will need to start this project a day before you give it to the kids to play with. It takes about 24 hours for the tub of ice to completely freeze.

In order to freeze the dinosaurs in the ice, you will need to layer them in the container so that they don’t all end up floating to the top of the ice. Start by placing about 2 inches of water in the container.

If you want to add food coloring, add a few drops of green or blue food coloring and stir to dissolve.

Place several of the dinosaurs in the water and put in the freezer until the water is frozen.

Take the container out of the freezer and add another layer of water and more dinosaurs and freeze again.

Continue until you have the desired amount of ice frozen in the container and let it freeze completely until the next day.

Take the container out onto the patio and dump the ice out of the plastic container.

Give your children the tools they will need to break the dinosaurs out of the ice. We had some soft mallets that wouldn’t cause too much damage if someone’s finger got in the way. You can also give them the garden hose and let them use the running water to melt the ice.

My boys had a great time digging through the ice for the dinosaurs. It is a fun activity for a hot day. You can also put the block of ice into a small wading pool and put your children in the pool with the ice.

Copyright 2012, This article may not be reprinted.

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Dinosaur Fossils

If your kids are studying dinosaurs, or if they just like doing dinosaur crafts, then they will really like making these dinosaur fossils. They are easy to make with just a few inexpensive items.

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For this project you will need:

  • A shallow plastic tub or container
  • Small plastic dinosaurs
  • Small plastic bucket
  • Plaster of Paris
  • Clean sand

To make these dinosaur fossils you will need some Plaster of Paris. You can find this at any craft store. You will also need some clean sand, enough to fill your plastic tub with about 2 inches of sand.

dinosaur fossils

This is definitely an outside activity, so take the tub of sand outside on the patio. Add some water to the sand so that the sand is damp but not soaking wet. Have your kids use the plastic dinosaurs to create imprints in the sand. They can use the same dinosaur more than once, you just need a good imprint of the dinosaur in the sand.

dinosaur fossils

Using the plastic bucket, make up a small amount of Plaster of Paris according to the directions on the package. Carefully spoon some of the wet plaster into each of the dinosaur imprints. The plaster starts to set quickly so only make up a small amount at a time. Let the plaster set in the sand for several hours before removing the pieces to dry completely.

dinosaur fossils

Note: You will have bits and pieces of plaster left over on your spoon and in your bucket. After it dries it will be easy to remove, it will just break off. Plaster of Paris is much easier to dispose of after it is dry. DO NOT pour liquid Plaster of Paris down your kitchen sink. The plaster could harden in your drain.

dinosaur fossils

After the dinosaur pieces are dry, give your children a small paint brush to gently brush the sand off of the fossils. They will have a great time playing with them and pretending they are real dinosaur fossils.

Copyright 2012, This article may not be reprinted.

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