Glue is a special material that is used to stick things together. It can come in many different forms, like in a tube, a stick, or a spray.
When you put glue on something, it starts out wet and sticky. As the glue dries, it becomes harder and forms a bond between the two things you want to stick together.
Some glues are made from natural materials like animal hides or plants, and others are made from chemicals in a laboratory.
Different kinds of glue work better for different materials. For example, you wouldn't want to use the same glue to stick paper together as you would to glue wood pieces together.
Glue is a really important tool for crafts, building things, and fixing stuff that's broken. Just make sure to use it safely and under adult supervision!