The couple's son Hank Jr. is now 19 months old and the NFL player has revealed he and his wife are trying their best to teach him new skills and words all the time.
Speaking at the Espy Awards in Los Angeles, Hank said: "Every day it's her (Kendra's) goal to teach him two to four things. He's just soaking everything up like a sponge. She just taught him phew the other day ... He'll walk by the trash and be like, 'Phew!' "
However, Hank Jr. is having trouble forming some words, leading to his parents believing he is using foul language.
The 28-year-old sportsman told E!: "It's funny [because] when he says sit it sounds like he's saying s**t! He'll tells our dog Martini, 'Sit! Sit!' And it's like, 'OK, I know what he's trying to say.' "
Kendra, 26, also revealed she and her husband are teaching Hank Jr. how to swim.
The former Playboy model said: "We're teaching him how to swim, of course, it's summer time. He's plugging his nose and going under water."