I guess all children love robots. I took our new Nao robot to Ponsonby Primary School today (my wife is a school teacher there). The children loved it, and some were very observant and asked some very insightful questions. They particularly liked it when he fell over, tried to get up, fell over again and then finally made it back onto his feet - they all cheered then and were really emphasising with it.
A video clip of it is here.