cience fair ideas?

Last year I just did a classic which chese molds the fastes but the which wood is the strongest is an even better science project.

Use someone else's ideas and give up your chance at a prize. Why not read up on a field that interests you? You will either find a topic that you want to learn more about or a statement that you don't trust and want to check. Either way, you'll do a better job. You might even learn something.

What laundry detergent works best? I did that one year in the 6th grade and got 4th place.

What light helps plants grow better? Sunlight? Colored light? Etc.

i'm doing do eggshells affect plant growth, my friend is doing does temperature affect glue adhesiveness. my teacher is tough but she accepted those so they must be good. the plant one is easy.

You did mean to spell it "Science" right? Good.