Decoupage is kind of like putting stickers on things, but with special glue. It's a craft where you take a picture or design you like and glue it onto things like boxes, frames, and furniture to make them look pretty and unique. The special glue, called decoupage glue or mod podge, helps the picture stick to the surface and makes it look like it's part of the object. You can use different types of paper, like tissue paper or even napkins, to make your decoupage creations. It's a fun way to decorate things and make them your own!