Trend Enterprises Addition Subtraction Discs Math Game Self-Correcting Ages 6-10

This is a lot of 2 math games from Trend Enterprises for Ages 6-10. The are Addition Discs (T-264) and Subtraction Discs (T265) that work through a turnable disc to allow the student to practice addition and subtractoin math problems. Each box comes with 9 discs. The sets are complete and in very good condition.