Description:

Classic Executive Desk Toy - Revolving Swing Balance Balls Perpetual Motion Desk Ornament

Powered by 4pcs AA batteries or USB, move lightly, it would keep going on rocking around until you stop it or power off ( Batteries are not included )

Kids educational physics science toy, the principles of Conservation of Momentum and Energy

Suitable for various Smart Phones, it can be shaked automatically and you will earn thousand of steps per hour easily

Great ornament for home or office desktop

Specification:

Size(L x W x H): Approx. 14 x 17 x 19 cm/ 5.51 x 6.7 x 7.48 inch

Package Includes:

1 Set Perpetual Motion Toy (Batteries are not included)

Note:

Due to the manual measurement, please allow 1-2mm differences in size
Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand