Brand in box of 6. Each one is polybag sealed. 
You can find Blue on your own just slide one of the game cards into Handy Dandy Notebook to get three clues, and then press the button to play.
There are four cards included.
Use the three paw prints to mark your clues, and the mini notebook and crayon to track them.
Requires 3 x AAA batteries (included).
Ages 3+