The Zhu Zhu Hideaway - call it a cave, a tent or sleeping quarters. It’s a little hideaway for your Zhu Zhu. You can use it for one or two Zhu Zhus. I also added a note in the pattern for making it a bit wider. I had to work that out as my granddaughter wanted it for a Zhu Zhu and 2 baby Zhu Zhus.