Mathematical
The set contains: a wooden board with 225 indentations of working square roots; 100 green beads with plastic box; 100 blue beads with plastic box; 100 red beads with plastic box
The set contains: a wooden board with 225 indentations of working square roots; 100 green beads with plastic box; 100 blue beads with plastic box; 100 red beads with plastic box
