My 5-year-old recently hit a little-kid milestone. She's learned to tell a joke, specifically a knock-knock joke.

They're not good jokes. Really, they make no sense at all, but she and her little sister find them hilarious and that cracks me up.

It wasn't quite Jr's Last Laugh, but you might have thought so at Subway the other night when Kelly entertained the table with her newfound sense of humor.

Her jokes go something like thi:

"Mommy, mommy....knock, knock."

"Who's there"

(she looks around the restaurant for something to say) "Garbage can"

"Garbage can who?"

"Garbage can butt stinky face."

This, of course, if followed by uproarious laughter from herself and her sister who was, by then, literally ROFL (for those of you not versed in IM speak, that's Rolling On the Floor Laughing).

After I brushed the crumbs off the little one's back and made her sit back in the booth, I haul out the grandaddy of knock-knock jokes. I'd been waiting to lay this one on her:

"Knock, knock"

5yo says, "Who's there?"
"Banana"
"Banana who?"

"Knock, knock"
"Who's there?"
"Banana"
"Banana who?"

"Knock, knock"
"Who's there?"
"Orange"
"Orange who?"
"Orange you glad I didn't say banana?"

Cue more uproarious high-pitched little girl laughter.

"Mommy, that's ... that's a tricky one! That's funny."

Ah ... just wait until she hears the diarrhea song I've been saving up since grade school. Ohhh...or the "Kindergarten babies, first grade snots" song. Not to mention "Miss Mary Mack," "Miss Suzy Had a Steamboat," and "I'm Bringing Home a Baby Bumblebee."

I have so much to teach them ... so many laughs to come.

Much as I miss my babies, I'm kinda liking these preschool years.