Sleeping like a baby

Rowan's latest hobby is removing his mattress from his bed and rearranging his bedding.  Most nights he calls Gareth or me upstairs to remake the bed, but this night I guess he was too tired and fell asleep mid-demolition.  He is tucked up inside the zip insert of the mattress like a sleeping bag. Surprisingly, the wooden slats from the bed are still on the bed - he uses them as a ladder propped against the wall sometimes.