Playpen
ahd-5
noun.
A portable enclosure in which a baby or young child can be safely left to play.
Wiktionary, Creative Commons Attribution/Share-Alike License
noun.
An
enclosed
space for
children
to play in.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a portable enclosure in which babies may be left to play