Bring happy time: just move your wrist and start playing, retro magic rail twirlers combine exercise and fun to make the game appeal to adults and teens for hours, which can exercise their hands and stimulate their curiosity to learn more about knowledge of physics, magnetism and gravity More interesting in the dark: when the wheel rotates along the track, the LED light will automatically light up, which will more attractive at night; And teens can use this charming luminous toy even if they are lying in bed at night, which can stimulate their imagination and will help them relax and fall asleep faster Relieve pressure: the fascinating lighting effects and the rolling back and forth of the rotating toy not only attract teens, but also have soothing effects and help suppress excessive activity, let them focus on toys and encourage them to easily explore the thoughts of gravity and magnetism Nice workmanship: rotating toys have well-aligned guide rails and are equipped with LEDs that will not short-circuit prematurely; Magnetic traction makes the wheel stick to the metal track under a small force and rolls on the track without falling; The 3 rotating toys can emit red, green and blue lights respectively Fun gifts: you will receive 3 pieces of magnetic toys, which are interesting gifts for teens ages over 12 years old; When playing, wrist movement also helps to improve teens motor skills, ideal gifts for Christmas or birthday Features: More interesting in the dark: When the wheel rotates along the track, the LED light will automatically light up, which will more attractive at night. And teens can use this charming luminous toy even if they are lying in bed at night, which can stimulate their imagination and will help them relax and fall asleep faster. Nice workmanship: Rotating toys have well-aligned guide rails and are equipped with LEDs that will not short-circuit prematurely. Magnetic traction makes the wheel stick to the metal track under a small force and rolls on the track without falling. The 3 rotating toys can emit red, green and blue lights respectively. Specifications: Color: red, green, blue Size (approx.): 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 2.5 cm/ 1.97 x 2.17 x 0.98 inches Package includes: 3 x Magic tail twirler (the wheel contains batteries Warm note: Suit to people ages over 12 years old. Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens.