Here is a great collection of perler bead, hama bead or fuse bead patterns for you to use with your own peg boards. You'll find all kinds of birds, insects, animals, flowers and transport perler bead patterns in this list.
Great idea for shape matching; can modify as needed for the little ones (Free shapes graphing activity. Practice shape recognition and learn graphing in a fun, colorful way. Kindergarten or Pre-K activity.