Now is the time to collect any loose change from the couch and put it towards a good cause. On Saturday, March 1, from 9 a.m. to 6 p.m., 98.9 WOKO FM will broadcast at Wal-Mart in Plattsburgh to collect the funds for the third annual Big Change Roundup. Over the past couple months, many local groups such as the Girl Scouts, Cub Scouts and students of Rouses Point Elementary School have been collecting loose change from everyone they know to benefit the Vermont Childrens Hospital in Williston, Vt. The groups, called change bandits, will bring in loose change to Wal-Mart to fill bins that will be weighed. The general public is also encouraged to stop by Wal-Mart throughout the day to add their change to the bins. Steve Pelkey, operations manager for Hall Communications, the corporation which owns and operates WOKO, said this is a spectacular event that brings in a lot of money for the hospital. Last year, 2 1/2 tons of change was collected, amounting to $149,000. The average household has $100 in change, said Mr. Pelkey, citing a national statistic. WOKO will be traveling in a 33-foot trailer from Ehlers RV of Essex, Vt., to collect the money. Collections will begin at the Ticonderoga Wal-Mart Friday, Feb. 29, from 6 a.m. to 6 p.m.; then move on to Plattsburgh the following day. The roundup will continue at the Williston Wal-Mart in Vermont Sunday, March 2, from 7 a.m. to 6 p.m., and finish with a broadcast from the Vermont Childrens Hospital Monday, March 3, from 9 a.m. to 12 p.m. While change is the focus of the roundup, Mr. Pelkey added paper money and checks will be accepted as well. For more information about the roundup and to read the blogs of Dr. Lewis First, the chief of pediatrics at Vermont Childrens Hospital, visit WOKOs Web site at www.woko.com.