Well... It depends. If you know 100% that he likes you.. Go for it!! Give them something. Sign your name. Be confident. They will know you care! And that's what will possibly get them to ask you out if your not already doing out. If you don't know he likes you I would still do it but he might think your weird if he doesn't feel the same way in return.
if you think he likes you a lot then you should send it as you but if your not sure send it as a secret admirer. are you guys friends? make sure he dosen't know how your handwriting looks cuz then he might know its you