Soundcheck - Olive and Otto must figure out how and why things are disappearing around town when all Otto wants to do is listen to a song by his favorite band, Soundcheck. Curriculum: Number operations; subtraction.Double Trouble - Debbie from Debbie's Pizzeria has doubled... not once, but twice, creating four Debbies! When one of the four Debbies goes missing, Olive and Otto need to find her. Curriculum: Numbers and counting; doubling.