Extreme Dot-to-Dot Set of 4: Prehistoric, Animals, Legends and Explorers Bundle of 4 Very Challenging Connect the Dots Puzzle Books for older children and adults. 30 to 34 puzzles per book. Several Dot to Dot Puzzles span two pages. Connect the Dot Puzzles in this series each have several hundred to as many as 1000 individual dots to connect. Demanding, formidable and stimulating puzzles. Recommended for ages 11 to 105 years. (Too complex for younger ages.)