I'm pretty bad at picking presents Ben likes. Stuff he wants, (car stuff, camera stuff, power tools,) I find excruciatingly boring and often out of my budget. Some books have been appreciated, but I know he doesn't need another Jeremy Clarkson/Richard Hammond/James May book in his stocking. Ever.
This year we agreed on one of those sites' products where he can use his photographs to make stuff. This has proven to be a good choice as selecting the product has been fun, as will selecting and polishing the pics and receiving the goods.