Series for pre-school children. Roly, Little Bo, Yugo and Migo 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. Yugo's got a new pet - a stone called Keith. Migo doesn't think that Yugo's new pet is very exciting, until Keith proves otherwise.