It is more simple and elegant design. This intelligent 3D printing pen inspires children's spatial imaginations. 3D pen can be family game, parents play with children to promote communication and companionship. Let children break free from their addiction to mobile phones, tablets and other electronic products, improve children's thinking and develop their creativity and artistic skills. The Drawing 3D print pen is the perfect gift for children. It helps to improve their spatial thinking skills and encourage their creative imagination. Create quality time and a colorful world for the family.How To Use - 1) Connect USB cable one end to the pen and other end to power source through DC 5V ~ 3A. 2) Press the power button . The light will turn red to show 3D Pen is heating up. 3) When the light turn blue means the pen is ready for use . Insert one end of filament into the loading hole . Insert the filament gently until it reaches the stop . Press and hold insert button and you will notice that the filament gently being fed into the pen. 4) When you see the filament appears at the nozzle .Press and then release the print button for continues printing. 5) To pause printing press and then release the Print button. 6) To speed up printing press (+) button. To slow down printing, press (-). NOTE : There are 4 speed settings. 7) To retract the filament, press and hold the power button.