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 visits Carrickfergus, an old castle in Northern Ireland, with his friends Jack, Caroline and Ross. During their visit they have three things to find - a princess, a prince and a throne. Mr Tumble pretends to be a king, but first he has to find a crown that fits.