This set of puzzles is made with special puzzle-grade wood with pure color non-toxic printing. All corners and edges are rounded and smoothed. Wooden puzzles help children develop strong hand-eye coordination, fine motor skills, and problem-solving skills. So it helps develop multiple skills! "This set of 20-pieces artistically designed jigsaw puzzles is a great starter puzzle set for toddlers and young children. When it's completed, it becomes a beautiful portrait that looks like an actual painting. This is a great educational toy for your home, homeschool, classroom or Montessori shelf! "