Adhesives are like really strong glue that people use to stick different things together.
Imagine you have two blocks, one red and one blue, and you want to stick them together. You can use adhesive to keep them together so they don't fall apart.
There are different types of adhesives. Some are like liquid glue that you use in school, while others come in strips or dots.
People use adhesives to stick things together because it's often easier and faster than using screws, nails, or other types of hardware.
Adhesives can also be used for a lot of different purposes. Some people use them to make crafts, while others use them in construction projects or to fix things around their house.