Any ideas for my daughter's 6th grade science invention?

Question

We are having such a hard time thinking of something we can invent that meets the requirements. The teacher wants the invention to solve a common problem or annoyance (she gave the example of how she hates drying her hair with a hot hairdryer in the summer). She also wants a model created but only out of common household items. I think the idea is also to try to create something environmentally friendly.

Any ideas you can give will be great.

Thank you all for your help.

Answer 1

Well for my invention I did a peanut butter and jelly sandwich cutter. I took a cutting board, and attached two pieces of metal and a sharper piece of metal and had the sharper piece like an arm that swings down to chop the sandwich in half!! Pretty Stupid but it worked!! Lol

~<3 Jen

Answer 2

Does it have to be something that works, or can it be an idea that could work? I was thinking a bug spray, that still killed bugs but didn't harm the O-zone, plants, or people. You could take an empty squirt bottle and glue a home made label to it.