Tidy up something square - clay illustration

Hello, This is the screen image for the iPad App I'm currently working on, for children below 5 years. There are such 16 screens with different illustrations in the center.

Initially this was the layout. Now I have to add a timer in the screen. Any comments, critiques are welcome! thanks! The high res files for these illustrations are here: www.behance.net/gallery/Tidy-Up-App/3825909