Explore a variety of inventions that impact our daily lives: from lifesaving medical devices and vital methods of transportation, to simple modern conveniences and products for entertainment. Each 11" x 17" (27.9 x 43.2 cm) poster features three categorized inventions and provides details about the inventors and the origin of their inventions. 8 pieces. Details: 11" x 17" poster size 8 posters For ages 8 and up