GLOW IN THE DARK FORT KIT FOR KIDS: Build endless kids play tent structures, forts for kids, play tunnels, and more with this construction fort set that includes 53 glow in the dark connecting rods and 28 multilink spheres,BUILD YOUR OWN FORT DESIGNS IN THE DARK: Create kids forts of various shapes and sizes, indoors or out by inserting and twisting the rods into the spheres (adult supervision is advised); glow in the dark pieces need to be exposed to light prior to activating in the dark,STEM LEARNING TOYS FOR KIDS: Build and imagine while mastering basic engineering skills; this construction fort building kit includes a building guide to ignite creativity; make a kids play tent by adding a light sheet for the roof,KIDS TENT CONSTRUCTION TOYS SPECS: This kids play fort kit is made with kid-safe, BPA-free plastic; includes 15.75” rods and 2.4” balls; these construction fort building toys are perfect for curious-minded kids ages 4 and up,FUN YOU CAN COUNT ON: Spark creativity with our Fun Forts building kit that allows kids to build their own fort playhouses; We’ll provide a full refund if you’re not building happily with this fort making kit for kids,AWARD WINNING STEM TOY: 2021 Mom's Choice Award Gold Seal of Approval winner for excellence in the kids product category