This is a video tutorial I wished to make for some time, but my laptop had become too slow to allow me to make ANY videos at all without devoting at least 12 hours to the project.
In any event, I finally decided the video was long overdue, whatever the price... It contains a complete list of all possible Birthday Gifts that you can receive in Sunshine Islands. When any item is a 'Most Favourite Gift' for the individual who gives it to you, that item is capitalised.
Birthday Gifts usually are worth at least 500 FP if 're-gifted' and therefore, the video provides some useful information about three Favourite items for each of the Characters as well as showing the advantages of befriending EVERY ONE on the Islands.