Madison Channing Walls' world has completely changed in the past few months: The MTV vet welcomed daughter Harper with her former Real World: Skeletons roommate Tony Raines in February. So how is the Texas native's precious peanut doing since we last saw her (when the newborn came home from the hospital with the duo during the Love in the Real World special)?

"Harper is a really happy baby," the proud mama reveals to MTV News in the video below. "She hasn't crossed any milestones yet. I'm waiting for her first laugh, her first giggle. She doesn't know how to laugh yet," Madison adds, while imitating her precious mini-me. What a kiddo!

Have any of Bubbles' roommates met the little lady -- and what is Madison most looking forward to as Harper grows? Watch the sweet parent open up about her spawn -- and for a little rewind, relive Baby Tadison's early days with her folks in the video below.