Nick Lachey may have already taught son Camden John a lot of new things — but learning to test the limits wasn’t one of them.
“He knows the word ‘no’ — of course he didn’t learn it from me, but he knows the word,” Lachey told PEOPLE at friend Matt Leinart‘s 8th annual Celebrity Bowl for Charity on Thursday.
“He’s a typical 2-year-old. He sees how much he can get away with and pushes the end of the envelope, but it’s a lot of fun.”
But the proud dad admits there’s plenty of exciting times, too. “It’s a great age. He’s discovering his personality, he’s getting into everything [and] he’s talking like crazy,” he says. “They start to figure things out and push their boundaries.”
The next lesson Lachey will learn: how to double up on parenting duties. The couple are expecting their second child — a girl! — later this year.
As for how Vanessa is handling pregnancy (and any possible cravings!) the second time around? “You’re going to have to ask her that!” Lachey teases.
— Anya Leon with reporting by Christina Dugan