I need help with a gift for my boyfriend?

okay...so my boyfriend and i are celebrating our half year next saturday...we decided that we are going to do homemade gifts. we decided that we are going to make each other homemade books..i have almost the whole book done but i need two more pages..i wanted to put a homemade trinket for one of the pages but i dont know what to do ...i wanna make him something that he can have with him at all times and really reminds him of me....he loves baseball and football...other than that ..we is just like an average guy....any ideas will help!!!