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. Yugo and Migo are very grumpy. Little Bo and Roly try to cheer them up, but there's one very important thing that they've forgotten to do. What can it be?