On the rocker balance ... An equilibrium can be demonstrated in an easy way. To this end, you can use either the 10 weight cubes enclosed or other objects for which the large surface provides sufficient space. The carvings, which have been marked 1-10, can also be used to explain additions and the two scale-pans are big enough for weighing games.
Material: synthetic material Measurements: 56 x 12 x 5 cm
