Does your family have a long space of time during the year when nobody has a birthday? Here's something to break up the monotony of everyday life: throw a surprise unbirthday party!
Pick someone you know who you think would particularly enjoy it, and invite them over. They will be so confused to see streamers, balloons, a cake, and presents! It will brighten their day, and will be a lot of fun. Maybe even play the music from Alice in Wonderland's Mad Hatter tea party in the background!