What should I get my boyfriend for his birthday?

My boyfriend's birthday is coming up at the end of the month. We have been friends for over 2 almost 3 years and have been together for almost 3 months. I have somewhat of an idea as to what to get him, but at the same time, I don't know. He loves tennis, swimming, and he is loves to juggle :) He is a sweet guy and I want to do something nice for him. Maybe make some bean bags for him for new tricks? Or maybe a t-shirt from his favorite juggling store? Please help :) Thanks!