1. Material: plastic 2. Fun gameplay promotes thinking and allows babies to exercise their brain power 3. High quality material, smooth and delicate 4. Can be rotated at will, a variety of ways to play 5. Wearable lanyard, more convenient 6. Lightweight and compact, easy to carry around 7. Weight: 19 grams 8. Size: 4.5x4.5 cm
How to play: 1. Randomly scramble the middle ball 2. Move the middle horizontal axis to replace the required beads in different O-shaped grooves 3. Match the beads in the 4 grooves at the fastest speed through memory and spatial imagination
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