Children's book about robots?

Question:

Children's book about robots?

children's book about robots that the main character builds from tin cans. The robots sail away in a rowboat at the end of the story. What is the title of the book? pre-1970

Best Answer - Chosen by Asker: "Andy Buckram's Tin Men" by Carol Brink
Andy builds a robot from a soup can and names it "Campbell"
http://www.amazon.com/andy-buckrams-tin-...