Yes, there is a fun way to study grammar! Road to Grammar is a website specially disigned to offer fun exercises to practice any grammar difficulty you may have. All activities are adult orientated so you will not find them too childish. There you can find online quizzes, extra practice and games, they also do printables if you like to work on paper. If you have children learning English at school, there is a junior version that you can use with them and enjoy learning together. Thank you Antonio Jiménez for the tip.