My son loves Caillou (PBS) and we are in the hunt for his birthday theme ware, which we will miss for this birthday. Cailou is a 4 year old boy who learns through his adventures. The theme ware is shown in pamphlets that come with the videos, so the hunt is on.  Fun game ideas to do with kids at a party would be outdoor hunt for items and use a butterfly net to collect items, boat races in a pool and what makes me a big kid- what can I do for myself now, what was I like when I was little, etc. My 2 year old son loves him and I've spoken to other parents of 2-4 year olds who also like what the show character represents.