5 years & up. Kids are going crazy for the Rainbow Light Up Fort! This 85 piece set features a secure lock system that is easy to use and ensures fort stability. The Rainbow Light Up Fort also includes a colorful LED light that makes the fort even cooler at night, as well as a manual with ideas of inspiration, but feel free to make your own awesome fort designs! Requires 2 AA batteries for LED rainbow light, included. Product measures 16.7" x 3.4" x 9.6".