Description: Install the mechanical device model as shown in pictures and try to fold it smoothly Help kids learn the instability of parallelogram Exercise your children practical ability Train your children observation capability, thinking and analytical skills Material: Plastic Color: As pictures shown Size Chart: Unfolding Size (L x W): Approx 32 x 4cm/12.60 x 1.57inch Package Includes: 1 Set Machine Hand Experiment Toy (with Chinese Instruction) Note: Due to the manual measurement, please allow 1-5mm differences in size Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand
