Features: Strong function: These flash toys are safe and silent. While bringing you happiness, they can help your boys or girls exercise perception and practical skills. The magnetism displayed by these toys contains simple principles, and you are able to give a simple explanation to your little guys so as to help them further understand magnetism and gravity, so that they can gain knowledge while playing. Durable and practical: As the rotating top rotates, the LED will automatically turn on to provide more charming lighting effects. It is very durable, even without batteries, the rotating wheel can be applied normally (only the LED light does not light). Specifications: Color: red Size (approximately): Rail twirler: 26 X 5 x 3.5 cm/ 10.2 x 1.97 x 1.38 inches Rotating wheel: 5 X 5.5 x 1.8 cm/ 1.97 x 2.17 x 0.7 inches Package includes: 2 x Magic tail twirlers (contains batteries) Tips: Manual measurement, please allow a slight dimensional error of the item. Due to different screen displays, the actual colors may be slightly different. These toys fit for people over 12 years old.