For each trip, you book you will find a group of gifts you can choose one of them for each adult for example if you book 3 Adults you will get 3 gifts
It basically is offers made by the company, and to get them, the number of adults must be proportional to the offer, because each offer has a specific number, and if you reach the required number in the offer, you will get the offer in addition to the gift provided according to the trip