Sure, you don’t have to make anything anymore, what with 3D printing, apps that instantly hire handymen and online stores that sell nearly everything. But then you’d miss out on one of the greatest joys of being human: the satisfaction that comes with standing back, wiping the sweat from your brow, and admiring something you created out of nothing. Whether it’s as ambitious as a 2 000-kilogram telescope (page 62) or as simple as a lamp made out of an old whisky bottle (page 67), go out and build something. That rush of pride you get when you use something you made yourself just doesn’t come with one-click shopping.