tangram

n.

A Chinese puzzle consisting of a square cut into five triangles, a square, and a rhomboid, to be reassembled into different figures.

backgammon

n.

A board game for two persons, played with pieces whose moves are determined by throws of dice.

wakeboard

n.

A buoyant board (resembling a surfboard) that is used to ride over water while being pulled behind a motorboat.

Wakeboarding is a surface water sport. It was created from a combination of water skiing, snow boarding and surfing techniques.

Before it was called wakeboarding it was called skurfing (ski + surfing).

kneeboard

n.

A short surfboard ridden on the knees while being towed behind a boat.

v.

To ride a short surfboard in a kneeling position.

seesaw

n.

The act or game of riding a seesaw.

Seesaw is a long plank balanced on a central fulcrum so that with a person riding on each end, one end goes up as the other goes down.

Also called regionally dandle, dandle board, teedle board, teeter, teeterboard, teeter-totter, tilt, tilting board.