The supermodel mom of three teamed up with Pottery Barn Kids to design a nursery for twin sons Roman and Malachi, 9 months, and give older son Isaac, 2½, a "big boy bedroom" to play and grow in.

Some of Calvin’s personal decor picks for the room include the rug, yellow blanket on his bed and sequined car pillow. Calvin is enjoying his new bedroom ahead of his little brother's arrival.