Who needs a cinema when you have a mobile phone, a magnifying lens, and a shoebox?
Phone stand (or bottle of water...)
It’s not quite the IMAX, but what this homespun projector lacks in scale it makes up for in endearing charm.
Fashion yourself an entertainment system fit for a king with a little craft and your mobile phone. Cut a hole in one end of an enclosed cardboard box and fit a magnifying lens into the gap. Turn your phone screen’s brightness to full power, and let it shine through the lens. Prop the phone up, and move it back and forth to get the right focal length. Point the beam at a blank wall, then sit back and enjoy.