Baltimore, Jan. 27—(AP)—Two children were dead today, a third was seriously injured and several others slightly hurt as the result of coasting accidents during the last few days. Milton Creagh, 14, died today in a hospital where he was taken Thurs day night after the sled on which he was coasting in Druid Hill park crash ed into a tree, following the death last night of Benjamin Deal, 15, who was fatally injured when his sled struck an automobile driven by Frank M. Bons], Jr., noted society man and horseman. William Kemmerer, 11, suffered a fractured skull last night when his sled, with his head projecting beyond the front, smashed into that of a com panion ahead of him. He is in a ser ious condition in a Baltimore hospital. Several other children were either in hospitals or at their homes after receiving hospital treatment for in juries received in coasting accidents.