It All Ads Up Fat Albert and the Cosby Kids : Season 7 Episode 10

At school, the gang is assigned to gather some items that they can sell at an upcoming sale so they can raise money for the school library. But most of what they've collected is defective junk. Despite the gang's better judgment, Rudy hawks the items to people making them believe they're better than they cost, particularly an inflatable raft to a young boy. When Henry tries it out afterward, he's endangered as the raft has a hole that Rudy sealed with only chewing gum. Fortunately, Fat Albert and Rudy are able to save him in time. And the gang's teacher shows them the consequences of false advertising.