Declan's chewing-gum experiment makes a big mess. His dog gets gum on her nose. The cat is gummed up next, as well as Dad and Declan's sister. When Declan pops a piece into his mouth, his teeth get stuck together! Visits to the vet and dentist fix the gooey mess, but it will take Declan months to pay his parents back. No matter! Declan is already thinking about his next experiment.
