Handy tool for visualizing sums up to 10. 
The set consists of 20 frames in 2 colors that can be connected together. The double-sided counters fit perfectly into the openings of the frame.

Contents

20x 5 frames (green and yellow) (dimensions: 4.5 x 19 cm)
100 double-sided counters (blue and red) (dimensions: diam. 2.5 cm)