"Mathematical set of textured (convex) numbers and signs" 1 2 3 ...10...20

"Mathematical set of textured (convex) numbers and signs" 1 2 3 ...10...20
Advantages:
👍Visual support: number - quantity, more - less.
👍 Visualization of the composition of the number within 10 and 20
👍Simplification of the transition to studying the numbers of the 2nd dozen.
👍The convexity of the number allows beat the task "recognize by touch"
👍 Possibility of additional elements to the order
👍 Safe material - RIA-plastic
👍 Possibility of ordering in a different color
The size of the die with the number - 6.4*4.5*0.5 cm

Set 1: numbers from 0 to 20, numbers from 1 to 5, mathematical signs.

Set 2: numbers from 0 to 10, numbers from 1 to 5, mathematical signs.