Use old jeans, cut into squares, add some batting material to the center, sew edges together. Either sew or draw the "X" and "O" onto them and instant tic tac toe game for kids! - Cool to do with beanbags too.
Heart pillow in neutral tones. This can go with a lot of color schemes and bring some charm to a room. Possibilities: Use pieces of old jeans instead (sew around heart shape far enough inside to let it fray).
square pillow insert and a large sweater, cut into two squares. Sew the right sides of the wool together along the edges, leaving the bottom open. Turn right side out and insert the pillow form, then stitch the bottom closed.