The fairy

It's gray and cloudy outside, and the Megaminimals are having fun indoors - all except for Bonnie, who doesn't like rainy days. She goes out into the yard and tries to get the sun to come out and shine, by shouting to it. And to her amazement, a little glowing ball comes down out of the sky. Bonnie tries to speak to it, but when the other Megaminimals come out into the yard, it flies away. The five friends run after it, trying to work what it could be. Could Eric be right? Is it a fairy from the forest?