We received the Code & Go Mouse to test and review and I was so excited when we received it. My 5 year old daughter has had so much fun setting up mazes and coding the mouse to find the cheese. It is really easy to set up the maze and I love the included cards so she can enter the code without making mistakes. If she can see what she needs to enter it makes it easier and she can make more complex puzzles. I also like that it included maze ideas to help her get ideas on how to set it up. It was something she has really enjoyed playing with, and I love that she is learning something new while she plays.