Educational series for four- to seven-year-old children with learning difficulties, offering teachers, parents and carers a range of approaches to develop language and communication skills. Justin meets his friend Savannah and her sister Cheyenne at the vet's. Their pet guinea pig Patch is not feeling well and they hope the vet can tell them what is wrong. While they are visiting, they must find three words: vet, medicine and tortoise. Meanwhile, Mr Tumble is pretending to be a vet.