found: Work cat.: Dot-to-dots [CF] c2006.
found: Wikipedia, May 14, 2007(Connect the dots, also known as dot to dot or join the dots is a kind of paper puzzle containing a sequence of numbered dots. The puzzle is completed by drawing lines between the dots in order of the numbers, starting with a line between the dot next to the number one and the number two, and continuing on until the last number is reached. The drawn lines reveal a hidden picture.)
found: Google search, June 14, 2007(connect-the-dots puzzles, dot-to-dot puzzles, join-the-dots puzzles)
found: Travel games, c1988:p. 66 (the challenge is to draw a picture by joining the dots)