Timmy has lost the last piece to his jigsaw puzzle! But wandering the nursery to find it, he discovers other lost toy pieces. Returning these to their rightful boxes but failing to find his jigsaw ...

Timmy the little lamb heads off to nursery school and will have a lot to learn as he finds his place in the world. Harriet and Timmy come up with a plan for Timmy to give a very unusual performance.