textured cloth (kitchen towels?)
Wrap the rolling pins in rubber bands and the textured cloth and poured some paint into the trays.
Gently roll the rolling pins in paint and roll onto the paper. (This creates a texture on the paper.)
Do the same with the sponges and utensils.
Show them how to pull the fork tongs through the wet paint to make a design.
My kids love making textures this way!