Mix your gelatin with cold water, place in a small pot, and heat while stirring to dissolve gelatin.
Once your gelatin is dissolved, turn off the heat and combine birdseed with the gelatin contents of the pan.
Place your cookie cutters onto parchment paper lined plates. Scoop the bird seed mixture into your cookie cutters and press it down with your fingers.
Press a stick in the top of the seed mixture to make a small hole for your string.
Set in freezer for 10 minutes. Remove from freezer and set on the counter at room temperature for about 10 minutes. Carefully remove the bird feeders from the cookie cutters.
Use twine tied through the hole to create a hanger.
Hang your DIY bird feeder in a tree outside for little birds to enjoy.