Midori (3) asks me everyday (actually almost everyhour!),
"Am I bigger?"
This past 6 months or so, she has realized there are so many things her brother can do but she can't because she is "small". Riding a school bus, building a fire, taking Butterscotch to walk, eating with chopsticks, etc...To my surprise, even though those things are brought up constantly, she never complains or gets frustrated. She would just say "Oh, I can't do that because I'm small?" and seems convinced.
But, it doesn't mean that she doesn't care about it. I realized that she had been measuring her own limits every day and now she knows that she is getting bigger every day! "Let me open the refrigerator for you. I'm bigger, mom." "Please don't help me, mom, I think I can reach the sink." "Can I carry the (grocery) bag for you?" "(turning on a light) Mommy! I reached it, I'm big!" Even after dinner she looks at her big belly sticking out happily "Mommy, I'm getting biiiiiiiiiiiig." She knows she is getting there. She is really confident and I'm proud of her.