Education.com is a place to find science projects and ideas such as making water magnifier and discovering why honey crystallizes. Science Kids also offers a wide range of science projects from designing an egg drop shell to growing crystals.
Science projects ideas range from simple, such as turning water glasses into xylophones, to more contemplated, such as making a water magnifier. When turning water glasses into xylophones, a third grader merely fills glasses with different levels of water. She places the glasses in a row from the emptiest glass of water on one side to the fullest glass of water on the other. Then she can tap the glasses with a metal spoon to make different sounds.
Another science project suitable for a third grader is growing salt crystals. This project requires a jar, salt, string, toothpicks, scissors and water. The student first fills the jar with water and adds 1/2 cup of salt. She needs to mix the salt and water. Next, she needs to make the contraption on which the salt grows, requiring a string and toothpick. She ties a piece of to the two ends of the toothpick, creating a loop. She needs to rest the toothpick on the mouth of the jar with the string submerged in the salt water. Finally, she waits for crystals to form.