MAGNA-TILES Glow 16-Piece Set.The ORIGINAL Magnetic Building Brand. Creativity sparks in the dark with these unique Glow tiles! The fun doesn't stop when the lights go out. Now your kids' MAGNA-TILES creations can reach for the stars and come to life - in the dark! Explore STEAM concepts through fun experiments, unique learning activities and one-of-a-kind building possibilities! The MAGNA-TILES Glow 16-Piece Set is a great addition to your collection, enabling kids to come up with some truly unique creations. When they're done building, turn out the lights and reveal the glow! We're all about STEAM learning and science truly shines with Glow. With the included LED keychain light, kids can supercharge these pieces or leave them in direct sunlight to activate the glow feature. The longer the tiles are exposed to light, the longer and brighter they shine! Parents and teachers alike have found dozens of unique and interesting ways to incorporate Glow tiles into fun science activities and lesson plans. What is Included: 16 magnetic pieces, including 4 Squares, 12 Triangles and an LED light. What Makes It Unique: Magnetic shapes that glow in the dark. Works with direct sunlight or supercharge pieces with the included LED light key chain. Developmental: Encourages imaginative play and exploration of cause-and-effect principles, while fostering the development of hand-eye coordination and fine motor skills. Great for Gifting: Makes a great gift for kids ages 3+.More to Explore: For tiles that sparkle and shine, check out the MAGNA-TILES Stardust 15-Piece set.Always Compatible: All pieces are compatible with and complementary to all other MAGNA-TILES sets. Safety Guaranteed: All MAGNA-TILES pieces are built to withstand countless hours of playtime. Our signature lattice prevents cracking, while fastening rivets keep magnets safe and secure. Superior Quality: Made from only the good stuff, none of the icky stuff. MAGNA-TILES pieces are made from food-grade, non-toxic and highly transparent MABS plastic that's free from BPAs, phthalates, and latex. Magnets are selected with kids in mind, letting them easily pull-apart for frustration-free building and rebuilding. Made With Purpose: MAGNA-TILES sets are loved by builders ages 3-99 and are purposefully made for kids to enjoy, without instructions or adult assistance with building. Meaningful Play, that is: Fun and Engaging, Experience Based, Child Led and Developmental. For Ages 3yrs+Pack Dimensions (cm): H: 26 W: 21 L: 6*** Contains non-replaceable coin battery ***