Stir boiling water into dry gelatin mix in large bowl at least 3 minutes, until completely dissolved. Pour into 13-by-9-inch pan; refrigerate at least 3 hours or until firm.
Dip bottom of pan in warm water 15 seconds. Cut into 24 decorative shapes using 2-inch cookie cutters, being careful to cut all the way through gelatin to bottom of pan. Lift Jigglers from pan; reserve scraps for snacking. Store in tightly covered container in refrigerator.