Most American kids are unable to escape from Chinese Finger Traps.
Read about it here:
This classic prank fools kids and unknowing adults. Get the victim to push their fingers in both ends of the trap. Watch the fun as they try to get them out. The trick to escaping the finger trap is to push the ends of the trap inward, toward the middle, thereby enlarging the openings. Made of bamboo.
1 to 11 pieces for $.30 each
12 to 143 pieces for $.20 each
144 to 1439 pieces for $.15 each
1440 or more for $.10 each