For collage activities you will need brushes, glue, materials, objects and base boards. Suitable surfaces include paper, wood, food trays, cardboard boxes, in fact anything with a surface. Using natural materials can be beneficial to child development as they can walk around a park, collecting materials and observing natural patterns. For a more challenging gathering of materials children can be required to put materials into different boxes based on the type of the materials (e.g. Flowers with flowers).
Some suggested materials are:
Start with a few items first, to avoid children being overwhelmed by too many choices.
This can be used as an individual or group activity.