Sports fabrics are easily available in stores and on-line. I did Giraffes for my oldest grand daughter, and Cheetahs (harder to find) for the 2nd. Trains for g-son and princesses for youngest. They are now ready for more grown up themes, so I will be starting again soon. I helped make a quilt years ago with an embroidered "A" for Anaheim Angels, and the bottom of the quilt was the field with bases and names embroidered of family members on them. It turned out really cute. The surrounding squares were baseball themed fabric cut into softball shapes.