From cards to bookmarks, these DIY Valentine's Day gifts are easy to make (and sustainable!) for your best friend.

Forget about buying an expensive gift and make this super easy DIY craft. A heart-scribbled mug is an ideal gift for a mother, father, friend, or boyfriend. It is the simplest gift handmade with love. All you need is a plain white mug, sticky back plastic, and a red porcelain pen.