Chalk "board" fabric - FUN!
I read about "chalk board fabric" online but had never actually seen it. Picked some up for a summer sewing project with my 8 & 9-year old granddaughters and had lots of fun with it. Pics below: First is an 8-ish" square to try out the materials. The larger ones are 18-ish inch pieces. The girls loved using them as much as making them.
My only caution is to be careful of fingernail scratches. From manufacturer: do not allow iron to touch the fabric (will melt, I think). Also, unforgiving if you rip out a seam... needle holes remain.