• metal
• Abacus for math--the construction of this product ensures both safety and reliability for during use,abacus for adults
• Abacus--help learn mathematics, life cognition, play while learning, and entertaining,calculating
• Abacus for education--exercise grasping ability, hand and brain coordination, fine movement,wood abacus
• School abacus--beads colorful design, bright color, can attract attention, not only to learn arithmetic, but also to understand the color,calculation wood abacus
• Vintage style abacus-- are encouraged to actively participate and explore the concepts of math through this tool,calculation counting tools