At my niece's 4th birthday party today, my 7 yr old nephew says "Uncle Joey, wanna see my slingshot I made!?"
Of course I do, having made my share at his age. His elastic broke, and they didn't have any stronger ones. Aha! I think to myself. Time to break out those big thick "Johnny Bench Batter Up" style elastics I've been hoarding for just such an emergency.
Then I ask him "You know what's better than slingshots? Catapults!"
A couple quick sketches later, he announces he wants to make a catapult. So home I go for handsaws, nails and the Johnny Bench Batter Up elastics.
Of course, his promises to help, as well as those of my 6 year old nephew, last about 10 minutes, tops.
But I built the fucker anyhow. It ain't pretty, but it shoots a rock a good 6 feet, with a strong tailwind. :)
To give an idea of the size, the longest log is about 3 feet long. Had some difficulty with the part that holds the rocks, but like all good home projects, all it needed was some duct tape. Badass!