What do I give to my crush on his birthday?

We are friends, I want to give him something small and meaningful. Also he knows that I'm planning to give him something as a friend kind of hinted it to him. Is aftershave a good idea? Or is it too personal? And what message do I write on the card. I'm going to leave it on his seat in class and tell him to open it on the say of his birthday. Is that ok?
What do I give to my crush on his birthday?
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