SAN FRANCISCO — The idea for Robert Macauley’s “photographs for the new millennium” sprang from a camera that is totally 20th century.

“What if you could create a Polaroid experience for your phone?” Macauley said as he showed off a prototype of LifePrint, his pint-size printer that works with an augmented-reality app. LifePrint lets you print out Polaroid-size images that, when viewed through the app, can come to life on your smartphone screen.

The newspaper that covers the wizarding world of Harry Potter publishes photos that move on the page. For us Muggles, there’s LifePrint, a pocket-sized printer that brings a similar magical to our still photos.

The LifePrint device lets you embed a video inside a printed photograph, using augmented reality and requiring the viewer to point their smartphone at the picture to bring it to life.

LifePrint might finally have invented a printer that you’ll want to use. It’s a wireless, internet-connected box that lets you print pictures from your iPhone (or Android phone), and you can also send photos direct to the printers of your friends and family.

Did your mother ask you to send her your baby photos? You can just print them out on the LifePrint she has sat in the hallway, on top of that lace doily.