This compilation is made up of Mum episodes from season 1!

The Day The Baby Came to Stay: Mum is looking after a friend's baby and Grandpa accidentally wakes him up. When baby Boris won't stop crying, Grandpa decides he needs a new toy to play with, so he puts on his shrinking cap.

A Tuneful Toot on the Trumpet: Mum is learning to play the trumpet and her practising is rather painful on the ears. So when she is asked to perform at Miss Smiley's cafe for the Young at Heart Club, Grandpa realises she is going to need some help.

Something to Treasure Forever: Dad gives Mum a beautiful necklace for their wedding anniversary but she loses it. Grandpa needs to shrink so he can find it for her, but Great Aunt Loretta has decided it is time he got rid of that tatty old cap.