Find a rock, paint a rock, hide a rock -- A simple but unusual hobby is spreading across the Buckeye State. Residents are picking up and passing along colorful stones to share random acts of kindness. You don’t throw them, you paint them – then place them for others to find. It is a trend that’s exploded in northeast Ohio. Inspired by similar groups in Washington state, Northeast Ohio Rocks has led to the formation of nearly 20 more rock groups across the country.