Sam is very keen to involve Amber and Wattbot 11 in an old game called Batterball. Unfortunately, he gives the wrong measurements for the pitch size and, as a result, a Wattbot falls down a ravine and is injured. Uncle Zak offers to use his helicopter to lift the injured Wattbot out of the ravine if Sam and Amber can make him a crate. Sam gets his measurements wrong again and Botler produces a gigantic crate. The children call for Numberella, who explains the relationship between centimetres, metres and kilometres. Sam and Amber realise their error. They soon have a suitable crate ready and the injured Wattbot is transferred safely back to base.