What are the materials of American labor force?

Cardboard, tape, box, etc. Art is a work in art, and the content of creative art is varied, including paper creation, three-dimensional painting, three-dimensional modeling, creative tearing, drainage painting, sand painting and so on. Of course, the materials used are also varied, such as cardboard, tape, boxes and so on. Meilao can increase children's hands-on ability and help children develop their brains.