Environmental ABS plastic;Safe simulation design,no odor and sturdy and not break easily;An interesting piggy bank specially designed for children.(Applicable Batteries: 3 * 1.5V AA Batteries (not included).) Four electronic password protection,if you press the wrong password, it will be issued.Only be opened when you enter the 4 digit correct password,the green light will turn on then you can turn the knob clockwise and open the door.(Default: 0000,Changable passwords as you like). This piggy bank can store 600 pieces of coins or 100 pieces of paper money.Make children to plan to store pocket money,greatly helping children develop a good habit of saving money.