Ben's face is worried because he knew his elephant was just about to fall apart and he hadn't added the trunk yet.
Mimi has a way of finding the perfect kid birthday gifts. This year's gift to Maura was actually a gift to all three kids. All three have spent tons of time creating new structures. Sadly, there is no picture of Maura's structure. I will post one soon. But honestly, her favorite thing to do is take apart the boy's structures, collect the pieces, put them in a bag and hoard them in her room.