Do you need some unique resources that aren't available from exploring the Island? No problem!
1. Tap on one of the available Island Buildings.
2. Select the available character who will be crafting the stuff you want. Fill available slots with resources you want to craft. Make sure you have the required resources for crafting, you can find the list in the pop-up on the resource.
3. Wanna have more slots? You can get more available slots by pressing the green one with a plus sign.