Here's some fun you can have at home with little to no effort: make a mini crossbow from a bottle cap, two popsicle sticks and a rubber band. You can fire off flaming arrows, toothpicks, skewers, Q-tips and more with just your thumb.
When Maxim Grew got bored, he decided to try building an instant camera out of a Polaroid film holder and a bunch of wooden popsicle sticks. He succeeded in building the thing—and it seems to work pretty well, too.
How is this possible? Thousands upon thousands of rainbow popsicle sticks, layered together into an enormous exploding chain reaction. But... but how? Is there a spring somewhere? Is the thing held together by sheer tension? Childhood magic! Holy shit.