Amber Portwood is currently experiencing a parenthood rite of passage: that moment you realize how quickly time flies. Yep, before you know it, your kid has grown from infant to kindergartner, and the former "Teen Mom" cast member shared photographic evidence Monday night of her darling daughter Leah's striking transition.

"I need you to stop growing booboo :( my beautiful baby leah...sending love everyone," the proud mama tweeted, along with a sweet snapshot of her mini-me practicing her duck lips pout (for future social media selfies, presumably). The little lady has clearly been paying close attention to her mom's own pucker techniques.

It won't be long now 'til you're sending her off to the school dance, Amber -- brace yourself!

Amber also tweeted the above pic of her "booboo having fun at the park," looking positively precious in a gingham dress and top-knot. We're totally on board with the ol' stomach-down, swing-riding method -- it's the comfiest way to play, and really, the most photographic. This girl really knows her poses!