My nephew turned 2 last month and he asked for a bagel party. My sister threw the sweetest party for him and wrote the most heartwarming entry about her little boy here.
For his party I made some favors for guests -- a bag of a dozen cookies that look like bagels. I used this Martha basic all-in-one cookie dough recipe and shaped them into little bagels. I flavored one batch with cinnamon and raisins, kept one plain, and sprinkled the rest with sesame seeds and poppy seeds.
I also made a big poster for a bagel toss game the kids played. I made it look like my nephew and cut out his mouth for the bagels to be thrown in. The kids had a lot of fun throwing mini bagels around.
See more photos of my nephew's party at my sister's site here.