Talking like a big girl

My now four year old girl (pictured here at preschool in her birthday cape and hat), has talked, up until now, without pronouncing the "Rs" on the end of her words: "Let's get in the cah now." "I wanna drive my bike really fah". Lately, she has begun emphatically chewing off those Rs. Today she talked about putting something in a jaRrrrr. She looked at me, grinned proudly, repeated it a few times, then skipped away. She's getting so big now, and I can feel myself already missing that baby talk already.