What present should I get my baby from Hawaii?

This is my 9 month old sons first time in hawaii and I want to get him something he can have from the trip. I would prefer something he can use. Something that shows it’s from hawaii and not just from a hawaii walmart like a toy. I’ve thought of hawaiian clothes, a hawaiian book cause he loves those, and maybe a frame saying his first time or something. But are there any suggestions of something I can get him that would be memorable and usable?