Does your child have a favorite toy(s) that he/she likes to play with? What do you think is/are the best educational toys that you child have?

Obviously I can't buy all the toys out there for Katie, so I'd like to pick the best ones that are highly recommended. I don't like to get her too much toys that they become wasteful, but will get her everything she needs to play with, be stimulated and learn.

Much thanks in advance.