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, especially when Yugo and Migo are close at hand. Someone very special is coming to tea and Little Bo, Yugo and Migo just can't guess who it could be.