When my oldest GD turned 5 I bought her a SEW MINI machine. Maya, has been quilting since she was 5. She's made at least 13 quilts and she's only 9 years old. Most of those have gone to charity and she's made some for her teachers. I believe she's even sold one or two. She's to the point where she uses the rotary cutter by herself. She's also graduated to a bigger machine. Only 9 and already has 3 machines. So, it's never too early to teach the little ones to sew, especially if they are eager to learn. Have fun with her you'll be making so many wonderful memories. Happy quilting!
She has some quilts posted on this site. Do a search; Maya's Flannel Quilt & Great Job, Maya