On a rainy day, Blue wants to go outside and play by splashing in the puddles while wearing rain boots. Blue and Josh find clues such as a paw print, rain boots, and splashing, which lead them to the conclusion that Blue wants to enjoy playing outside in the rain and puddles. They jump in puddles and even see a rainbow, celebrating the fun that rainy days can bring.
Additionally, in another context of a rainy day episode, Blue decides she would like to do something musical, leading to a game involving pot lids, drums, and a marching toy to create a marching band parade.
The primary activity for a rainy day in "Blue's Clues" is playful outdoor fun in the rain using rain boots, including splashing in puddles.
