Bartl Wisdom - Advanced Wisdom Ball (YCZ102)

• No formulas, challenging, very fun
• Improves concentration, logic and patience
• Excellent for all ages, stimulates memory and sensory motor coordination

Spherical puzzle with sliding numeric chips and 6 spinning discs. 4 discs have 8 numbered chips along the edge and 2 discs with 4 chips on the edge and 4 in the centre, the target puts the chips on each colour disc, and by numerical order. There is only one empty space to move the tokens from disc to disk.