"Collage materials" refers to a variety of materials that are used to create a collage, which is a type of artwork made by combining different elements such as pictures, cut-outs, fabrics, and other objects onto a surface. Full definition
This is especially true of collage materials which tend to be small and could pose a choking hazard. (verywellfamily.com)
Just lay a sheet of contact paper sticky side up on a table and provide your toddler with collage materials. (thespruce.com)
My combination of various collage materials, textures and acrylic paint produce abstract paintings suitable for both residential and commercial settings. (torpedofactory.org)