The vibrant Magna-Tiles are known and loved as the best magnetic construction toys. Now your children's creations can come to life in the dark with Magna-Tiles! The Magna-Tiles Glow in the Dark 16-piece set is a fantastic addition to your collection, allowing your kids to develop unique creations. When they finish building, turn off the lights and reveal the glow! Kids can play for hours while exploring STEM concepts and other benefits. The pieces in the Magna-Tiles Glow in the Dark set are made with a safe glowing formula and are constructed from non-toxic, food-grade ABS (BPA-free) plastic. High-quality ceramic magnets are securely embedded in the tiles using ultrasonic welding to ensure extra durability, so your child's creations stay intact for a long time. With an included LED keychain flashlight, children can charge the pieces to activate the glow or expose them to direct sunlight. The longer the tiles are exposed to light, the longer and brighter they will glow in the dark! Additionally, the Magna-Tiles Glow in the Dark 16-piece set is compatible with other Magna-Tiles sets, allowing you to combine and customize for maximum fun. The set includes 4 small squares, 4 equilateral triangles, 4 right triangles, 4 isosceles triangles, and an LED light.