We haven't actually seen many of those tricks. I guess it's comforting to know that Lucy will keep on with them for a long time to come.
One thing about this strip... Linus never does catch up with Lucy in height. His development slows down due to the Peanuts Time Warp effect and he always remains just a little behind her.
Maybe Schulz ran out of ideas for baby jokes, because he now seems in a hurry to have him achieve parity with the other characters. The kid doesn't have much infanthood left.
