A rainbow covers a grey sidewalk drawn by Zoe Inman, 13, of Portland at the inaugural "Chalk the Walk" event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Spreading joy, inspiration and optimism through sidewalk chalking is the goal of the event.

A message drawn with chalk by an unknown participant helps spread joy, inspiration and optimism at Chalk the Walks inaugural event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

A message drawn with chalk by an unknown participant helps spread joy, inspiration and optimism at Chalk the Walks inaugural event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

Audrey Alexander, 3, right, of Ridgefield dances on chalk art as she walks with her father, Chris Alexander, at the inaugural "Chalk the Walk" event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Spreading joy, inspiration and optimism through sidewalk chalking is the goal of the event.

Zoe Inman, 13, left, of Portland uses chalk to draw at "Chalk the Walk" event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Also pictured are organizer Debbie Oliver, upper left, Teighlor Glavin, center right, her son Bode Bergren, 16 months, and organizer Susan Glavin, far right. Spreading the joy, inspiration and optimism through sidewalk chalking is the goal of this inaugural event.

A message drawn with chalk by an unknown participant helps spread joy, inspiration and optimism at Chalk the Walks inaugural event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

Zoe Inman, 13, of Portland uses chalk to draw at "Chalk the Walk" event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Spreading the joy, inspiration and optimism through sidewalk chalking is the goal of this inaugural event.

Susan Glavin with "The Joy Team" helped organize Chalk the Walk Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Spreading the joy, inspiration and optimism through sidewalk chalking was the goal of this inaugural event.

Debbie Oliver with "The Joy Team" helped organize Chalk the Walk Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Spreading the joy, inspiration and optimism through sidewalk chalking was the goal of this inaugural event.

Grace Wonser, 3, of Vancouver, watches as her grandmother, Lauree Eastman uses chalk to draw at "Chalk the Walk" event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Spreading the joy, inspiration and optimism through sidewalk chalking is the goal of this inaugural event.

A message drawn with chalk by an unknown participant helps spread joy, inspiration and optimism at Chalk the Walks inaugural event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

Spreading the joy, inspiration and optimism through sidewalk chalking, Kellen Larsen, 10, left, and Max Lafayette, 10, of Vancouver, draw hearts Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

A message drawn with chalk by an unknown participant helps spread joy, inspiration and optimism at Chalk the Walks inaugural event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

Spreading the joy, inspiration and optimism through sidewalk chalking, Sandy Jewell, 12, left, and Nate Camp, 11, of Vancouver, draw on the sidewalk Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

Spreading the joy, inspiration and optimism through sidewalk chalking, Max Lafayette, 10, left, and Kellen Larsen, 10, of Vancouver, draw hearts Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

Spreading the joy, inspiration and optimism through sidewalk chalking, Lauren Steele, 14, of Portland, takes a break from drawing while holding a chalk with her foot Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington.

Sofia Champman, 14, left, and her friend Lauren Steele, 14, of Portland enjoy each others company while drawing with chalk at the inaugural "Chalk the Walk" event Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Spreading joy, inspiration and optimism through sidewalk chalking is the goal of the event.

Susan Glavin with "The Joy Team" helped organize Chalk the Walk Tuesday August 23, 2011 at Esther Short Park in Vancouver, Washington. Spreading the joy, inspiration and optimism through sidewalk chalking was the goal of this inaugural event.