Set offers children an easy way to build fun, sturdy forts. Following the suggested builds or your own unique ideas, stack the specially designed cups that interlock into place, then slide on the builder rings and connect the builder rods. Use the included blanket clips to secure your own sheet or blanket on top of the fort and seal in the fun! Building forts is a breeze with this handy system. Lets children develop skills as they build their own forts to play in. Encourages imaginative play and develops fine motor skills, hand-eye coordination, and early math skills. Set includes 56 cups, 10 blanket clips, 8 builder rods, and 8 builder rings. 82 pieces total. Ages 3 and up.