GIDS make finding items in the dark easy. Using the best glow in the dark technology, GIDS are fun to stick anywhere. They are 1.25" in diameter making them small enough to stick on remote controls, light switches, down dark hallways, but bright enough to enhance night time visibility on important objects. It's just that little glowing indicator to let you know something is there. The GIDS are great indoors or outdoors, you can even nail them to fence posts, use them as trail markers, or even cave tracers. They come with adhesive mounting squares so you can stick them indoors, but make their locations more permanent by using glue, nails, etc.