Workbench

In the game things are made at the workbench in your house: walk up to it and press E (on a phone, the glowing action button) — a 5×5 grid opens. Lay the materials out as the recipe has them and the thing appears on the right. A recipe you make is written into Grandad's Book, in the chapter "Crafts", and opens the ones that follow it.

Here you can try any recipe beforehand: pick a thing from the list, or lay out the materials yourself.