Both my preteen and my toddler love crawl-through tunnels, play tents, and the like. They are great for a sense of containment for my kid who has sensory integration issues (as so many foster children do), and for my toddler as well. They are a quiet escape when they need to reduce their sensory input, but also help in developing gross motor skills and can be used as part of active sensory-stimulating play. Best of all, they're just plain fun! This one is just $19.99 (marked down from $50.00) on Zulily right now. There are equally inexpensive play tents, such as a pirate-themed one, that also look fun. Deals on this site are temporary, so grab them before they're gone if you are interested. If you're not already a member, Zulily is free to join and is a daily deal site for high quality childrens' toys and clothing as well as household items and women's clothing.