Cookies shaped like cowboy boots and hats are a must for the cowboy party. Serve up lemonade in mason jars tied with twine and fun striped straws or root beer in old-fashioned bottles. For party favors, place the cookies in cellophane bags, tie with rope and a "thank you" tag.
Have guests dress in preppy golf attire. For the invitations, use a green and navy color scheme with a little pop of red. This is a popular theme for boys turning four because you can utilize the word "FORE!" on the invitation.
Mini cupcakes with green grass frosting topped with fondant golf balls and red flags are the perfect bite-size treats. To make the red flags, cut a diamond shape of red paper, fold in half and use double-sided tape to attach to a toothpick.