Like most free apps this is a sample of what is available. My 2 grandchildren ages 3half and 5 loved it and played free version regularly. We have now bought it and now they have the full 101 puzzles they love it even more. Check out settings for changing levels.
My 2 year old finds this really easy to use, the different puzzles vary on difficulty which challenges him to the right level. Makes it a good app for both him to play independently and for playing with Mummy or Daddy