Since PAPERO cares about its customer's health and the environment, all PAPERO products are eco-friendly and use paper which is completely harmless to humans. PAPERO products are safe and convenient because PAPERO has adopted a method of removing the pieces of paper from the form board and piecing the model together by inserting and fitting the bits of paper together instead of using a knife, glue or other potentially harmful tools. The systematic difficulty levels and assembly methods of PAPERO products can help users improve their intellectual, concentrative and creative powers. Users can create their own PAPERO product by painting them freely.