Wow! The Pocket Money We'll Save

Floyd, Leora, David, Janet, Barry, Fiona, Jarmaine, and Meg do not see the need to save any of their pocket money, at all at all. What with candy, trinkets, chocolates and games to enjoy. In fact, they do not even believe in saving any of their pocket money for a rainy day - even when their parents send them to the Banks' strange house. So, not surprising, not a single thing the banks say or do to tell them otherwise, seems to work .
and the Banks do try very, very, very hard. In fact, the children so frustrate all the Banks' efforts, why, the Banks totally, totally give up, and accept they just cannot convince this lot ... until the children eat the green forest cake and the strange looking yellow and black tasty eats. Then ......