This single dot to dot puzzle is from the Dottoo Dots Halloween collection. It counts by 3s, starting at 2. Buy the complete set, or pick and choose the puzzles individually. These are not your mother's dot to dots. They skip count by 1s, 2s, 3s, 4s, 5s, 6s, 7s, 8s, 9s, and 10s, and they begin at various start points, increasing the challenge. The Halloween collection has 14 different puzzles, with a "hard" and "easy" version of most of them. Incorporate these puzzles into your number sense,