[Archie's Mom]

I first left Archie in an xpen when he was three months old and 1 1/2 pounds and he 'till this day has never jumped or climbed out of the pen (he's now 4 pounds and a year and 1/2 old). I leave him toys, some comfy blankets to burrow into, food, water, piddle pads and usually a Kong with treats. I also leave the TV on (silly, I know, but I'm convinced it soothes him). Why don't you try him for a couple of hours at a time to build up his acceptance of it? Good luck!