HIGH QUALITY MATERIALS AND FINE WORKMANSHIP: Mideer jigsaw puzzles set has been certificated to Lead-Free/BPA-Free/Phthalate-Free by the Third-Party Lab. We choose water-based paint. Moreover, the surface of each piece is smooth, rounded, and has no splintery edges, which can protect toddler's hands at all times, and is finished with bright color, suitable as a birthday gift. DURABLE AND LARGE PART: Mideer toddler puzzle is so durable that your little one can enjoy it for a long time. Each part of this puzzle is in the right size for tiny fingers to grasp and big enough to avoid swallowing the puzzles. FAMILY FRIENDS ACTIVITIES: Mideer jigsaw puzzles for kids aged 4 years old are great tools to socialize during play, find new friends or just have a nice time on their own; with this puzzle, a toddler's playtime will be fun, meaningful and bright. Perfect gift for Children's Day, birthday, Christmas, Easter, etc.