Shake your paints well. Then mix equal parts of paint and marbling medium in small disposable cups.
Use masking tape to mask off the dome part of the glass rocks. Leave the flat part exposed.
Paint the glass rocks. Let the kids drop paint on them any way they want to.
Then they can swirl the paint around with the craft stick or pcik up the glass rock and tilt it to help the paint run together.
Set the glass rocks to dry. Keep them as flat as possible while they dry.
Once the paint is dry, remove the masking tape. Use a craft knift to scrape off any paint that seeped under the masking tape.
Adult Part: Use a strong adhesive to attach the magnets to the flat side of the glass rocks.
Let your kids draw faces on their magnets with permanet black marker.
Adult Part: Cut small pieces of the green pipe cleaner for the stems. Then attach the stems to the glass rocks by hot glue gun.
Add the magnets to any magnetic surface.