1) Acrobat launcher 2) Acrobatic sport 3) Dandle board 4) Plaything 5) Seesaw 6) Teeter-totter 7) Tilting board 1) See-saw 
The teeterboard (or Korean plank) is an acrobatic apparatus that resembles a playground seesaw. The strongest teeterboards are made of oak (usually 9 feet in length). The board is divided in the middle by a fulcrum made of welded steel. At each end of the board is a square padded area, where a performer stands on an incline before being catapulted...