We've been reading a really cool non-fiction book about rainforests at bedtime, and Lex and Eli both love the little sidebar jokes in it. It's really entertaining to me, because half the time they just laugh at the joke because I'm laughing, not because they understand the joke. Except this one. Lex wanted me to keep repeating it, and I kept explaining it to him, until he could finally tell it on his own (and explain why it's funny). His first joke. I'm so proud. Enjoy.