It's the original coat hanger.

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It's a caliper used in Roman times as they were practicing their famous shield-to-shield phalanx formation. The officers would measure the distance between each head using this tool.

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It's the only piece left after the famous burning of the libraries in Alexandria. It's a shelf bracket that was in a maintenance man's hand as he ran out of the building.

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It's an early gyroscope for boats. The little doodad in the middle is a level. If the bubble is on the right, everybody lean right. If the bubble is on the left, everybody lean left.

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It's a practice bat'leth, for infant Klingons. Once you turn 5 years old, though, you need to use real blades, though.

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It's a small scale model used for Roller Coaster architects. Like a "don't make curves sharper than this" sign, but without numbers.

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It's a golf-course practical joke. The ball tip was typically painted white and the object was buried into the ground. When people mis-took the while ball for their own golf ball, they would get quite a surprise when they hit it with their clubs.

Ninja - by louisros (Black, XL)

It's the last item to be picked up from the lost-and-found. So it got posted on the internet to help find the owner.

Ninja - by louisros (Black, XL)

It's a specialty-made walking cane to help blind people going around corners.

Ninja - by louisros (Black, XL)

It's an ice pick for people who weren't strong enough to use the axe-type. If the wielder of this pick couldn't get the pick wedged deep enough into the ice, they could his the ball with a hammer until it was far enough in.

Ninja - by louisros (Black, XL)

It's Ben Franklin's favorite practical joke. He tied the ball to his kite string and stuck the pointy end right next to his friend. When lightning stuck, the friend would get shocked, and a good time would be had by all.

Ninja - by louisros (Black, XL)

It's the Hulk's boomerang! Originally, it was a long straight mace, but he bent it and pressed it together until it became his favorite throwing toy / weapon.

Ninja - by louisros (Black, XL)

A quick-remove tent-peg. Just pull the handle to pull it out of the ground, and you're ready to go!

Ninja - by louisros (Black, XL)

It's a tree-climber's axe. One strong swing to lodge this into the tree, then you've made a hand-hold as well as a foot hold for yourself. A series of these can get a man high into the trees.

Ninja - by louisros (Black, XL)

After too many people got their hands smashed holding railroad spikes for the sledge hammers, one crazy inventor created this spike-holder to keep his hands safe.

Ninja - by louisros (Black, XL)