A shoe dryer is a special machine that helps dry wet shoes. When your shoes get wet, they can get smelly and uncomfortable. A shoe dryer works by blowing warm air into your shoes, which helps get rid of any wetness and helps your shoes dry faster.
Imagine you just went outside and jumped in a big puddle. Your shoes are now all wet and squishy. You don't want to wear them like that all day, so you take them off and put them on the shoe dryer.
The shoe dryer has a special spot for each shoe to sit on. It has little holes where warm air comes out. The warm air gets blown into your shoes, and it helps dry out any wetness. Just like when you blow on your hands to warm them up, blowing warm air on your shoes helps dry them and make them feel better.
After a little while, your shoes will be dry and ready to wear again. They won't be smelly anymore, and they will feel nice and comfy on your feet. That's all because of the shoe dryer!