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.
Tiered Blue Tree Felt Holiday Ornament - Silk Road Bazaar (O) Women in Kyrgyzstan made this ornament by hand from felt. With a loop for hanging and accented with sequins and beads, the ornament measures 5 inches tall.