Isbn: 9780140222487 - children solve problems (1 resultados)

Pictorial Wraps. Condición: Very Good. 227 pp. With b&w illustrations by children. Light edgewear, spine very lightly yellowed, light surface scratching, light blue marking on rear cover near spine, else a very good copy. "The nine tasks the children were set included a machine to weigh elephants, a system for building a house quickly, a sleep machine, a space rocket, improvements to the human body, and methods of helping police deal with bad men.".…