A ten-year-old girl, her younger brother and their pet mouse make a unique investigative trio especially as the mouse has the ability to transform into a six-foot fast-talking rodent! Big mouse, bigger mouth!

Lois Frost (10) and her younger brother Larry (8) won’t go anywhere without their pet mouse, Zip. It’s not because they can’t be without their pet, it’s more because Zip has the ability to transform into an enormous fast-talking mouse! This is great fun in itself but Lois and Larry use Zip’s unique abilities to help them investigate various suspicious, weird or mysterious goings-on at home, school or in the wider community. These adventures invariably involve twisted scientist McVey (40s) and his talking cat Fluffy, who are hell-bent on capturing Zip for their own nefarious ends.