y First Puzzle Set series are great starter puzzles and will help little hands develop fine motor skills. 4-In-A-Box 123 introduces numbers as the puzzles progress from 2 pieces to 4 pieces, to 6 pieces to 8 pieces, giving your child the opportunity to grow and develop with the set. The 8-piece puzzle brings the characters from the other three puzzles together in one animated scene with lots to talk about. My First Puzzle sets are a great way to help your toddler build tactile and problem solving skills. Each puzzle measures approximately 12.5” x 8.5”. Ages 2+ years.