Calculating with self-control
... with the help of four calculating fans - children will learn basic arithmetics. Begin on the upper left side and do it downwards. In the middle of the fan you can find the instruction for example + 1 and on the right side you can find sums. If you think you chose the right sum, fix the string underneath the hack and put the string on the backside to the left side until the next number. With the help of the lines on the backside the children can control themselves. Every fan has 10 boards.
Material: synthetic material
Measurements: 5 x 15 x 2.5 cm
3 years and up
WARNING: Not suitable for children under 36 months due to long cords! Danger of strangulation!
