Today Kit and Pup are exploring the opposites Thick and Thin. They start by painting. Pup is painting very neat thin lines with a paint brush and Kit is painting messy thick lines with a wide decorator's brush. Kit and Pup then try to find as many thick and thin objects as they can. In the live-action investigation Kit and Pup help the little investigators sort thick and thin objects. And in the stop-motion moment a row of books orders itself from thick to thin.