It would be best to have a computer or laptop for better designing models. If you want to do that, go to tinkercad.com and sign up for free. Then watch a tutorial on designing models in Tinkercad. After your model is designed, you will have to convert it to an .stl file and import it on to a TF card that comes with the Tina2 plus printer. Put the TF card back in the printer and you can print your model.