I put out four different shapes of the erasers and this tray that I got at the dollar store. I demonstrated how the activity was done then placed it on the shelf. Caden has done it twice but it was far too easy for him. I had my two nieces (3 years old) over and they enjoyed it and it was a bit of a challenge for them. Drake has yet to try it but I might get it out today during our 1 on 1 time.