Benjamin is 5, Levi is almost 3.

Benjamin: Mom can we eat the poopy bugs now?
Alysa: What???
Benjamin: I mean, can we get dressed in our swimsuits and play in the sprinkler?
Alysa proceeds to question him in detail about "poopy bugs", and still has no idea what he was talking about.

Alysa: Chris is Kelley's husband. They're married.
Levi (to Kelley): Yeah. You can be married.
Kelley: Oh, thank you. I already am! Someday you will get married, too.
Levi: I will get married in 3 years.
To be fair, that's more than double his current lifespan, so it must seem like a long time . . . :)