Series for pre-school children. Roly, Little Bo, Yugo and Migo all have their own best things but there are some things that they can share too. Little Bo visits her uncle, Roly Mo, in Fimble Valley every day and there's always something exciting to do during a visit. It's picnic time, but when it starts to rain it looks as though the picnic will need to be called off - until Roly comes to the rescue. How will Roly get round the rain?