First copy write is illegal you should never do it. If you want to copy write you have to have the owners permission end of discussion. You can use there stuff just as long as you put it in your own words and don't copy and paste it. Like I said you can use there stuff if you put it in your own words some will let you copy and paste for educational reasons or research for school. You still need the owners permission to use there stuff if you copy and paste it. You also have public domain which is stuff that you are allow to copy, but you still have to give credit to the person who made it. You can only use a certain amount because it will be copy write if you use to much. You can find everything that you need to know if you just go to these web sites Copyright Kids , Cyberbee.