This is very good! It helped my 11 year old son to be recreative with his work, using puzzles and other widgets to make him want to do more. It's just like maths and this is what we want for our son to do. We want our children to go to college, of course and this website does very good handling when it comes to this. I would recommend this for all ages, it doesn't matter where you are.
Sign up or not, I don't care. Play it, there's lots to do and lots to toy with.
Give it a go, I assure you you will enjoy it!
Thanks for reading.