You can always take the thread and bobbin out of your machine and let her sew around designs that you and she make. Simple ones like diamonds, circles, spirals, squares, triangles, etc. Notebook paper is good too, then she can learn to sew a straight line.
Build take some of your quilts, lay them over your table and build a tent.
Have a tea party
play dress up
When my DD was that age she loved to help. Let her help do some laundry and fold the washcloths.
Give her some scissors and some old fabric with designs and let her cut them out. If you put some fusing on them first then you could applique them onto a doll quilt for her.
Teach her to shop at the local LQS