Excuse me for coming off as an Anglocentric knucklehead, but is this the international symbol for "no children allowed?" Traditionally that message has been depicted by a bar across two children running. What's up with the circle around the kid's head? If this child is an angel who lets a parent hold his/her hand, then what is the problem?
Perhaps these gardeners have had issues with toddlers not respecting plot boundaries while their parents have their backs turned. I have seen that happen but not too often. I'm just curious to know if any youngsters who are too young to read have encountered this sign and successfully interpreted it.