My son is 6 weeks and already out grew the bassinet part of the pack n play so I'm going to take it off and lay him in the pack n play since I'm not ready to put him in his actual room yet. But my concern is that he likes to roll on to his side and and sleep so what can I do to prevent him from not rolling all the way over? I was thinking of getting a doc n tot but I'm not really about to spend that much money on one that I'll use for a short period. is there something else I can do?