A crib-a-glow is a special light that you can attach to your baby's crib. It's like a little night light that helps you see your baby better when it's dark in the room. The light can change colors and sometimes even plays soft music to help your baby fall asleep. It's also very safe because it's designed specifically for use in a baby's room. So, basically, a crib-a-glow is a cool tool that helps you check on your sleeping baby without turning on a big bright light that might disturb them.