I know this isn't usually what glow is used for, but me and my group need help.

For our math final exam we need to invent and make a prototype for something using 3 mathematical concepts (but that doesn't matter rn). The problem is WHAT to invent. It needs to realistic (no teleporter, spaceship, etc), something we can make with basic stuff, something we can make in 4-6 days and something that doesn't already exist.

So what do you ladies (or men idk) need or what is something you would think would be useful? We are having trouble coming up with something.