This mental arithmetic incentive is perfect for children who want to improve their math skills. The device performs sums using the four operations and checks the student's answer. It gives scores for correct answers and visual rewards when 5 sums are correct. With five difficulty levels, kids can develop their skills at their own pace. The device runs on solar cells, making it environmentally friendly.

Specifications:

- Weight: 113gr.
- Dimensions: 153x80x17cm.
- Works on solar cells.