Each vibrantly-colored letter and number has a magnetic back layer, stick the plastic block on other ferromagnetic surfaces as well such as the refrigerator for group-and-split fun. Cool item for fridge door.If you have something what you need to do,you can give children this games toy to keep them busy and you are free. All letters and numbers magnetic stick are constructed of non-toxic plastic and environmentally friendly material which is up to ASTM safety standard.Completely smooth edges for both children and parents.The sturdy plastic can be washable and durable for playing. The set toys comes with a storage bucket which is convenient to play outdoor and car travel.It can also help kids develop a good habit of packing things up. Great gift idea for your children's Birthday/Christmas/Children's Day.Allowing parents to accompany their children to teach and have fun together,so it will promote parent-child interaction and communication.