I like the idea of the wood like fence. You could have one pannel for every child in your classroom and then use it as a growth chart for toddlers. When the child moves up or leaves the centre you can give it to the parents. Use Pallet wood.
Historic Amsterdam canal houses are the inspiration for these charming "storage houses" by Kast van een Huis. The brightly colored cupboards, available in any configuration, would be an enchanting addition to a child's room — or even my guest room!