This activity is more appropriate for school aged children.
Take a foam meat tray and trim the curved edges off of it making it flat.
Have the children take a pencil and etch a spider web on it. If the children
choose they can add a spider or fly. Have the children paint over the design
with white paint. Have them lay a piece of black construction paper over the painted tray and press. Carefully lift the paper off and they will Have a beautiful print.