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Free Grade School Science Fair Projects

Get Free Science Fair Project Ideas for Grade School

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Save your money! Find a grade school science fair project idea that won't cost you anything.

Save your money! Find a grade school science fair project idea that won't cost you anything.

Dimitri Vervitsiotis, Getty Images
Find free science fair projects for the grade school or elementary school level. You can also find science fair project ideas by topic. Grade School Science Fair Project Tips

Grade school or elementary school science fair projects don't need to be particularly complex. The most important aspect of the science fair project is that it is interesting to the student. It's a good idea to seek a science fair project that can be completed quickly, like over a weekend. While adults are expected to help with the display and report, the student should do as much of the designing and experimenting as possible.

  • Which household chemical or kitchen ingredient cleans coins the best?
  • Compare nutrition on pet food packages. Is more expensive pet food better somehow?
  • Can you determine whether your pet can see in color?
  • Does chilling an onion before cutting it keep you from crying?
  • What recipe produces the best chemical volcano eruption?
  • What type of plastic wrap best prevents evaporation?
  • What plastic wrap best prevents oxidation?
  • Are night insects attracted to lamps because of heat or light?
  • Does the presence of soap in water affect plant growth?
  • Can a saturated sugar solution still dissolve salt?
  • Does magnetism affect the growth of plants?
  • Does the shape of an ice cube affect how quickly it melts?
  • Do different brands of popcorn leave different amounts of unpopped kernels?
  • What is the best way to control odor in shoes?
  • Research how long you have to be out in the sun for the body to produce vitamin D.
  • What sports give the best total-body workout?
  • Compare cookies baked with butter to those baked using margarine.
  • Do the same types of mold grow on all types of bread?
  • Does light effect the rate at which foods spoil?
  • Can you use a household water filter to remove flavor or color from other liquids?
  • Does the power of a microwave affect how well it makes popcorn?
  • Can you tell/taste the difference between ground beef, chuck, and round after they have been cooked?
  • What household chemical produces the best invisible ink?
  • What is the biggest bubble you can blow?
  • How much dishwashing liquid do you really need to get dishes clean?

  • Trace the path of traffic through your home. Can you move items in the home to make it more efficient for family members?
  • How permanent are permanent markers?
  • What plants grow in your yard?
  • Is laundry detergent as effective if you use less than the recommended amount? More?
  • Do all hairsprays hold equally well?
  • How does the rate of evaporation of the crystal-growing medium affect the crystals?
  • How do crystals grown from uniodized salt compare with those grown from iodized salt?
  • Does seed size affect the growth rate or final size of a plant?
  • How does cold storage affect the germination of seeds?
  • What conditions affect the ripening of fruit?
  • How are different soils affected by erosion? You can make your own wind or water and evaluate the effects on soil. If you have access to a very cold freezer, you can look at the effects of freeze and thaw cycles.
  • How close does a plant have to be to a pesticide for it to work?
  • What is the effect of a chemical on a plant?

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