"They're protective but more sweet, sensitive brothers," she told Us of Mason, 6, and Brady, 4, at the Operation Shower/Birdies for the Brave baby shower for 40 military moms-to-be presented by Carousel Designs on Wednesday, Feb. 13.
"One of them [Mason] thought that he could breastfeed and that would help the baby so we had to tell him that's not really how it works!" she said with a laugh.
Hart, 36, welcomed her third son with husband Mark Wilkerson on Sept. 18 last year, and has been enjoying the milestones each of her boys have been reaching ever since.
"He smiles and laughs endlessly," the Melissa & Joey actress told Us of Tucker. "He loves the sound of his voice. … He heard his voice screaming the other day and loved it so now he loves to scream!"
Mason and Brady are similarly picking up on their own interests -- including a recent love of hockey -- despite the family's often hectic schedules.
"It's a crazy time right now but they are such troopers," she said. "They are handling it so well! They are roll-with-the-punches kind of kids, they just handle change. They're like me, they love adventure and excitement. Everything we do it's like, 'Wow, what are we going to do today? Who are we going to meet?'"
Luckily for Hart, her husband -- who is also the lead singer and guitarist for rock band Course of Nature -- is always on-hand to help out.
"It's totally a team effort and he is 75 percent of the parenting workload," the actress gushed. "[We] don't want to miss a moment so we try to be there for every opportunity for a bath, every after school activity, every hockey game, every soccer game. We don't want to miss that stuff."
"I know a lot of people with newborn babies that stay at home with the baby," she continued. "Maybe I'm a little selfish but I'm like, 'I want to watch my son at hockey,' so I bundle up the baby and bring him in a car seat and bring him with me. I go through the extra effort to be the older ones too!"
This article originally appeared on Usmagazine.com: Melissa Joan Hart: My Son Mason "Thought He Could Breastfeed" and Help With Baby Tucker