Dolce has been in her playpen since she was about 3 mths old. Of course it has no top, so after a while she figured out how to jump out of it like the video of that little baby climbing over the fence (they are so smart)...finally my father had the idea, because i was afraid she would hurt herself or get out when no one was home and start a rampage of destroying the house, to put 2 pieces from a large dog crate, those wire ones, on top of the playpen so she couls not get out of the top. She is in there from 7am until 5:30-6pm. So far so good....has not escaped once!!