-- Books. I don't have any recommendations for frog books that seem to fit your BF's interests, but if he is into snakes as the BP suggests, here are a couple to consider:
Snakes: the Evolution of Mystery in Nature (https://amazon.com/Snakes-Evolution-...0286476&sr=8-1) Expensive new, but we gift used books in good shape and a book lover knows that's cool. A wonderful book.
Boas and Pythons of the World (https://amazon.com/Boas-Pythons-Worl...s%2C103&sr=8-1) is a good one that is available new for a very reasonable price.
-- Gift cards for online supply retailers such as Pangea, or a local independent shop if you have one.
-- Day trip to a zoo that has a herp house.
-- A donation to Amphibicast with a request that Dan give a shout out to your BF on the air.
I'm not sure about the supplements you chose. They are not really suitable for amphibians either by themselves or mixed/alternated (the SV doesn't have enough calcium by itself, and mixed/alternated with the CaLoD will end up with a serious lack of Vitamin A for amphibians), and the BP doesn't need supplements. Perhaps you've researched this and know the situation -- I don't mean to come off as critical, but just thought it was worth a mention. The idea to gift supplements is a good one, as is the whole 'goody bag' idea.![]()