Create endless fun with the Glow in the Dark Fort Building Kit, perfect for kids to build their own forts and structures! FUN FORT BUILDING KIT: Build endless glow in the dark play tent structures, forts for kids, play tunnels and more with this construction fort set that includes 53 connecting rods and 28 multilink spheres BUILD YOUR OWN FORT DESIGNS: Create giant kids forts indoors and outdoors by inserting and twisting the rods into the spheres (adult supervision is advised) 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!