Description: Install the experiment device model as shown in pictures and then rotate the bearing above, the barrel will rise up or go down A perfect experiment to help kids learn the lever principle Exercise your children practical ability Train your children observation capability, thinking and analytical skills Material: Plastic Size Chart: Assembled Size (L x W x H): Approx 10 x 5 x 21.5cm/3.94 x 1.97 x 8.46inch Package Includes: 1 Set Lever Experiment Toy (with Instruction in Chinese) 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
