These sell for $25 at Walmart

DreamTents are fun pop up tents that give your child their own private world at night. There's an Undersea World, a Fairy Tale Forest, a Winter Wonderland, a Space Adventure, and so many more. DreamTents make bedtime fun. DreamTentsvare easy to set up and easy to store. They instantly pop open and they fasten to the bed in just seconds. They work on all twin beds, even bunk beds. To store them, you just fold, and put away. It's that simple!
As Seen on Tv Dream Tents Space Adventure Pop Up Tent Features:

Creates a fun & private space for kids to enjoy
Easily pops open and fastens to the bed in just seconds
Works on all Twin beds, even bunk beds
Made of durable high Quality material
Folds flat for compact storage