Lincoln Logs are an American children's construction toy consisting of square-notched miniature lightweight logs used to build small forts and buildings. They were invented around 1916 by John Lloyd Wright, second son of well-known architect Frank Lloyd Wright. Lincoln Logs were inducted into the National Toy Hall of Fame in 1999. They are named after U.S. president Abraham Lincoln, who once lived in a log cabin.

A construction set is a standardized piece assortment allowing for the construction of various different models. Construction sets are most often marketed as toys. A popular longtime construction set toy brand is Lincoln Logs.