Uncle Zak is keen to market Junketir jam. He has discovered that successful production depends on each hive having between 850 and 900 Prebbies in it. While he discusses business with Lisa he asks Sam and Amber to fill some jars from the hives. Unfortunately, Amber knocks over the hives and Prebbies fly everywhere. Numberella helps them to return the Prebbies by demonstrating how to add two 3-digit numbers. Sam and Amber restore all the Prebbies to their hives before Uncle Zak returns.