The Magic School Bus Season 4 Episode 2 - Cracks a Yolk Episode Title:Cracks a Yolk.Episode Description:Mr. Ruhle (from Makes A Rainbow) gave the class the task of caring of Giblets, his pet chicken. However, Giblets "flies the coop" and the class decides to get a new Rhode Island Red to replace Giblets. Naturally, they decide to hatch one from an egg. They learn on their trip that both a male and female chicken are needed to produce a chicken (though it is never explained why, being a children's show.) At the last minute Giblets returns. "I guess he who flies the coop can always fly back again," says Ms. Frizzle.