Melissa Joan Hart and Mark Wilkerson
Her second baby is "kicking like a maniac"
– and Melissa Joan Hart is getting ready for its arrival by making major changes around the house.
"We actually moved [2-year-old] Mason into a big boy room and left the nursery the way it is," Hart recently told PEOPLE about rearranging her house to prepare for her second child with husband Mark Wilkerson. "It's very neutral."
And while Mason will soon have a new sibling, his parents are still doting on him, Hart said.
"We made him a big fish [themed] room," she says. "It was his birthday a few weeks ago, so we got him a bed from Pottery Barn – and my stepmom came and put murals on the wall of fish, whales and turtles. It's huge, and he's got a fish tank now."
With all the activity, one thing still hasn't slowed down: her baby is
kicking. "[The baby's] been way more active than our first son," Wilkerson said. "Every day [the baby's] doing aerobics in there."
Reporting by JESSICA HERNDON