Meritnation.com is a website where you can get your all the study materials you do really need. It'd be bad to tell that the website is bad for children I too use it when I have any kind of doubt its upto the children how they're using this website for them. This websites isn't only for copy paste work like copying some question's answers and copying homework etc. Here you can also get many difficult stuffs clarified like maths, physics, chemistry etc etc. This website for class 1 - 12 standerds students. Again its upto you how you're gonna use it for your betterment or for your own bad. Thank you : )
