Post-its

I was asked the other day, If i could have invented anything, what would it be?

I thought about this for a second and came up with a few things. Of course there are the big things; the wheel, the fridge, tv, internet etc but the two things i would love to have inventedd would be

1. The Camera. The whole process of capturing light to make a memory boggles my mind every time i think about it.

2. The post-it note. Like in Romy and Michelle. It is something that i use each and every single day and that i think is so simplistic but clever at the same time.

What would you like to have come up with?