The hidey-hole tree by itself would make a great DS item, if Playmobil are paying attention.
It's a mediaeval robbers set. The master of the house is away visiting his estates. You put the child in the trunk and get the trunk into the planned victim's house by saying it is for the master when he returns. Then, when everyone is asleep, the child comes out of the trunk and unbolts the door and lets his/her confederates in to rob the place. They put the loot in the trunk and leave with it and the child by the front door.
. . . making a Halloween house will be in order.