When Riff ends up losing his lucky medal, he thought he won't be able to play games at the Shapes Carnival in the park. Barney and his friends show Riff he doesn't need his medal to have fun. After it rains, Baby Bop spies a beautiful rainbow. When the others come to see it...it's gone. Baby Bop is very disappointed, so Barney and the others paint their own rainbow. When it starts to rain again, the homemade rainbow collapses and gets it all ruined! Luckily, the real life beautiful rainbow appears again!