Puxxle is a puzzle made out of 2x2cm vinyl adhesive pieces resembling pixels that are stuck on the wall. Besides your average wall, you can apply them to mirrors, glass, metal, and plastic, and they’re even rated to last outdoors for 3-4 years. Pixel by pixel, an image appears or, if you are feeling artistic, create you own. I love how they have a variety to choose from (including famous artists) and not just characters. Also, they remind me of old video games like PAC-Man or Space Invaders, which I love!
They glow in the dark!