Another cool idea. Can they each bring a favorite t-shirt for the center of the quilt? That would be a fun way for them to personalize the quilt. There are also ways to heat set markers or crayons on fabric so they can actually draw on their quilt fabric blocks. I did this with my son and just used different colored sharpie markers. That might be fun. I have used warm and natural for my son's daycare quilt and it have been washed about 75x (once weekly... every weekend) and counting. The red fabric has faded slightly but man has it held up well.