Malwarebytes blocked some process on the site when I visited a page. Not sure what it was because it didn't block the entire page itself, but still a reason to be cautious. Definitely not safe for children.
If you ever go on this site on mobile, you will get popups where ever you tap. Some of these popups on iPhone show the Safari "Crashed" tech support scam. It is safe when you have Adblock, though.