double magnetic beads pairs of battle chess educational toys 6-12 years old development intelligence brain child parent-child interaction board game

[ordinary style-24 pieces] 2-person battle [ordinary model-32 pieces] 2-3 people battle [ordinary model-40 pieces] 2-4 people fight [storage model-24 pieces] 2-person battle [storage model-32 pieces] 2-3 people battle [storage model-40 pieces] 2-4 people battle [supplementary set-12 pieces]] [supplementary set-6 pieces]]

strong permanent magnet bead