4 Packs brain building jigsaw puzzles. It helps toddlers to improve concentration and problem solving abilities. It can also develop toddler's memory,colors,logic,patience,imagination and hand-eye coordination. Suitable Size for Kids: The well-polished surface with round edge of these animals puzzles are more safely for toddlers. Each colorful pieces fits comfortably in kids little hands. They are all common animals. Let your kids learn them through playing with the puzzles. This 3D puzzle is easy for tiny fingers to grasp and place.The smooth-polished surface with round edge of these pieces fits comfortably in little hands. They are safe for children, your baby cant swallow them as the blocks is big enough. Each colorful pieces fits comfortably in little hands. Thick wood brightly colored. These are not too complicated for toddlers, I am thinking these are best for the 2 to 3 year old.Or you can mix all the pieces up and let them work from all for boards to make it a little more difficult. Easy for the little hands to handle, much better than probably the larger puzzles would have been. The colors are all bright and the animal theme is just perfect. And theyre really good for developing hand eye coordination as well as color and shape recognition. Please Pay Attention: since material are made of wood, do not get close to heat and fire. Keep dry, do not touch water for a long time or soak in water. Please allow an error of 1-2cm.