Use Common Materials
Children, especially younger ones, learn science best and understand scientific ideas better if they can experiment and explore ideas and concepts that are common place in their world. For example, if your child loves to play with bubbles, design a science project where you experiment mixing different amount of water, dish soap and glycerin to come up with the best bubble solution. The key is to make sure there is only one variable in the test – keep the amount of water and dish soap the same, but change the amount of glycerin used in each test batch. The goal is not to let the materials distract from the actual process of experimenting and gathering data.