Personally my favorite is the frozen mace i can create by just freezing an orange stuck with nails in it and sticking it to a broad stick with hot glue Any invention can be accepted as long as it is fabricated from everyday items for example:a catapult made from a spoon and a few pebbles have fun with the idea it can be original or made by someone else its first come first serve though enjoy crafting =]
you can remove clogs in your plumbing with a chunk of pure sodium xD....jk don't do that... it'll blow your toilet up.. plus if you touch it then it'll react with the water in your hands and cook/burn/damage your hand... so... leave plumbing to the Mario brothers.
My friend and I used 50 random idems (including: a sheet, a typewriter, and a banana) to make a clock that only we could read... we call it The Timer of Randomness.
