Over many thousands of years people have used glue. Some glue made from animals, plants, and insects. It has been used for buildings, art, and furniture.
There are many glues available today. There are glues that can be eaten, glue that can be easily peeled off and reused, and glue that can be made without harming animals.
Two uncommon glues found in stores, homes, and schools, are school glue and tacky glue. Both school glue and tacky glue are non-toxic and made of different man made materials. School glue is chemical based, tacky glue is water based. Both dry clear on your projects.
Many people think school glue is better because it is meant for school projects. I think that tacky glue is the better choice for