Sleeper sofas come in a range of sizes, from loveseats or chairs-and-a-half that convert into twin-sized beds and full-sized sofas that contain queen- or king-sized mattresses. Like buying a sofa ...

Kid-specific twin mattresses ... with an all-memory foam bed. A 10-inch Leesa Youth Mattress ($549) is also available for older kids and teens, as well as a 5-inch Trundle Mattress ($399), so ...

Instead of offering someone the couch and a questionable pillow ... ready for the ultimate sleepover showdown. Pop-up trundle: Want two twin beds that magically transform into a king?