Is he the oldest in your care? If so give him tasks to help out the smaller kids. i.e get him to play Simon says or tell them a story, even if he can't read he can still tell a story with pictures. Let him know he is your biggest helper. Let him help with diaper changes by getting you the supplies etc...Ignore the fibbing if it's harmelss.

I have 2 three year olds and the crazy questions about everything is normal, just answer with crazy silly answers. What colour is the sky, say rainbow, etc... they ususally laugh and tell you the correct answer. He sounds a bit board, does he like puzzles this can keep him busy when you need some down time. The leaf frog video's are amazing too for learning if you need to keep him busy while your making lunch etc... amazon.ca has some great deals. My 3 year olds love them we have like 6. They are only 1/2 hour videos but very eduactional.