A science project is a great way of teaching scientific concepts to kids, with a breath of fresh air. Doing projects brings an interactivity to the subject and enables better comprehension. Hence, the topics are learned forever, never to be forgotten. Quick and easy science projects for 4th graders, keeps the kids interested in activities which seem too difficult when taught in the confines of a classroom. These easy practical ideas make a tough subject like science extremely simple. So, if you have been looking for some project ideas for 4th graders then read on. Easy Science Projects for 4th Graders Volcanic Eruption Gigantic volcanic eruptions cannot be witnessed by each and everyone, and they are a little too preposterous to be imagined by kids at eight. To teach them the aftereffects of a volcanic eruption, make a simple volcano at school or home. Gather the kids and make each child get an ingredient to make the volcanic mountain and the eruption material. What you need is, 6 cups flour, 2 cups salt, 4 tablespoons cooking oil, 2 cups of water, 1 soda bottle, some POP (Plaster of Paris) to make the mountain, an old rug to cover the mountain, and few paints to make the scenery. To make the mountain, add some water to the POP and give it a shape of a mountain, which is fixed around the soda bottle, keeping the hole of the bottle open. Make a mixture of the aforementioned ingredients and add a hint of orange color to the mixture. Cover your mountain with the rug and paint it brown. Paint the scenery around it to make it look real. Once done, slowly pour in the vinegar and see the volcano erupt! Pulley Project Simple machines are not so simple to imagine. Assist your students' power of imagination with a pulley science fair project. This will help them understand how heavy objects are moved to the top floors without labor or a lift. To make this project, you will need an empty thread spool, 2 chairs of the same height, ribbon or thread thinner than the spool, 2 plastic pails with handles, string, broom and marbles. Now, thread the spool and tie the loose ends together. This will leave the spool hanging like a locket. Next, slide the spool and the thread through the broom handle and then slide it through chairs, so that the handle is parallel to the ground. Then, tie one end of the ribbon to the pail's handle and slide the other one through the spool which will loosely hang in the air. Now tie the loose end to the other handle. Put a few marbles in the hanging pail and see what happens to the pail on the ground! Cup Telephone In the age of cell phones, hardly anyone bothers caring about how sound travels. Well, a cup telephone is a sure way of figuring out how it does. For this experiment you need two plastic cups, some string, paper clips and sharpened pencil for poking holes. Now, at the bottom of each cup gently poke two holes. Now thread the hole with the string and pin the clip to the inner end to prevent it from sliding out. Once both the cups are strung together, gently pull the cups apart so that the string is taut. Make one person hold the cup to the ear and the other one to the mouth. Floating Eggs The usual perception of throwing objects in the water is that they sink. However, seldom do children understand the reasons behind. Teach them what actually happens with a simple egg experiment. You will need one egg, one glass of water, 5 tablespoons of salt and a drinking glass. Fill the glass half way through and add salt to it. Stir it till salt completely dissolves in water. Now carefully pour the remaining water, without disturbing the mix. Next, lower the egg in the water and watch what happens! It's Hot! We often tell kids to avoid wearing black clothes while playing in the sun. This experiment will help them understand the reason behind this instruction. You will need, 2 identical drinking glasses, water, thermometer, 2 elastic bands, white paper and black paper. Wrap one glass with white paper and the other glass with black paper. Put elastic bands around them so that they are held tightly. Now, fill both the glasses with equal amount of water and keep them in the sun for a few hours, before measuring the temperature with the thermometer. Find out which glass had warmer water and why. Most of these experiments do not require any expensive apparatus, and neither do they take much time. Hope these experiments help your students understand these simple concepts in the simplest possible way.