Paper is not particularly heavy - but it is great for everyday use. i haven't tried to print on it double-sided. I think it probably is better for laser printing that for ink jet.
Um its paper. It fits in the printer. Crayons work on it just fine. I have not yet tested it with markers but I am sure it will handle them as well. Why only for stars? Its just paper seriously its not like I was trying to print on leaves before I got this.