I take only toddlers too. And most "circletime" routines are beyond them both academically and physically in terms of sitting. I do things in small bursts such as a 5 minute lesson with an alphabet toy or a short feltboard fingerplay type rhyme. Also I find if the circletime is to ritualistic in the sense of the same thing over and over each day they do become bored quickly. If you are going to have some older children then the 2 year olds or at least some of them will enjoy sitting with the big kids and pretending to do what they are doing. Whether they understand much is up for debate or are they just repeating what they have memorized. The thing with big kids is they are doing the interacting with you and answering questions and putting things on the board which shows the 2 year olds what to do. With just 2 year olds you soon come to feel like a circus performer as you tell animated stories, do lively actions to songs you sing yourself, etc.