Boris is back in a fourth story - this time he and his classmates succumb to a bout of chicken pox.

Miss Cluck has to enlist the help of local farmer Mr Gander and Buttercup the cow to take the poorly animals home and her day in an empty classroom is rather a sad affair.

At least she gets the chance to make some honey-oat cookies as a welcome-back treat to give to Boris and his friends when they come back to school, fully recovered.