Me: Sienna, maybe we could take a break and have a snack.
S: No, I'm ok.
Me: Well, my arms are a little tired from pushing. Do you think we could take a little break.
S (benevolently): Hm.. Ok. But my arms don't hurt.
Me: But I've been pushing you, so mine are tired.
Two minutes pass...
S: Can we swing some more?
S: Are your arms still tired?
Me: Yes, but maybe we'll just swing super high instead of super-duper high.
S: Ok. But this is really low.
Me: I know, I'm getting you up there.
S: You are! You're doing it! You're getting it!
Nothing like having a two-year-old cheering squad!