content:1 balancing board, 2 coloured wooden balls (Ø 30 mm)The Erzi balancing board is scratchproof and demonstrates an unequal sprint involving a racing car and a tractor. This challenges the user to find the right balance on the seesaw without veering too quickly to the right and left so as to enable the ball to follow the faster player in the curved track without “overshooting the target”. Replacement balls: 46305