Carlos and Carmen aren't sure they're ready to take the training wheels off their bikes. Papá is all set to help, and Mamá has a new box of Band-Aids. The twins reassure each other and buckle on their bike helmets. And that's when the wheels start to wobble. Translated by native Spanish speakers. Aligned to Common Core standards and correlated to state standards. Calico Kid is an imprint of Magic Wagon, a division of ABDO.