Well, I think I would cut off the legs of the crib and leave them just to a short height. Two wheels off the stroller could be attached one at each corner on one of the ends. To attach you could make a short axel out a dowell and drill a hole into the short leg. Then you could take chicken wire and attach to the bottom of one of the cribs sides and form a wall and roof (picture it being like a covered wagon look only with wire rather than canvas) and secure it to the crib with zip ties or wire. You may want to run a support board down the center of the crib so that the wire is secured to it. I can see it all in my mind, and I know it could be used. I hope this makes sense.