Dinosaurs Dot Markers Activity Book for Kids Ages 4-12, Kids Activity Book with 50 unique Dinosaurs Dot Markers Design. This children's Activity Book is full of happy, smiling, beautiful Dinosaurs. For anyone who loves Dinosaurs, this book makes a nice gift for ages 4 to 12 years. Please note: This is a Children's Activity Book and the style is that of an ordinary child's Activity book, with a matte cover to finish.