ULPT request need edibles on a cruise

My dad has been a lot head since 11. I am treating him and mom to a cruise for his 70th birthday and her retirement. Issue is pot....how can I get edibles on. I'm not trying for bud.

I have never smoked or even tried it, I have zero desire. But if I want my dad to come he has to have something to keep him high.

I have literally, literally never in my entire life seen my dad not high. Not an exaggeration. This is important.

I'm in Florida and I am getting my pot card solely to get him weed when he flys to visit me.