Banjo: "When Kazooie and I first met! :3"

In this pic Banjo looks how it''s born the lil Kazooie, but the story goes on like this:

Banjo was playing soccer with his dad and Tooty, his sister. At some moment the ball fell into a bird nest; Banjo in a mistake took the bird egg instead of the ball.
When Banjo kicked the "ball" hard enough to break it, he realized it was an egg, and sit down to watch it hatch.