The Riddle
What has keys but can't open locks, has space but no room, and lets you enter but not come in?
Related snips
Riddle
what-has-a-tongue-that-cant-taste-a-nose-that-cant
i-have-a-face-that-never-frowns-numbers-that-never
what-has-a-bottom-at-the-top-but-never-takes-a-seat
what-has-keys-that-open-no-doors-a-space-that-holds-no
i-can-be-cracked-made-told-and-played-what-am-i