I enjoyed interacting with the 3D function plot. I moved it and twisted it in so many ways. I even pushed some of the buttons that made it transform it's state of being. It got me curious on what else I could click on to find out how math can entertain me. Math isn't my strong suit. But being able to manipulate what was presented to me at first was fun and educational.
Having to click on the object and hold down to move the object any which way I could was amazing and had me wanting more. But I wanted to give my comment in so others can definitely and substantially know that this is a site to visit and learn from.
Time spent reviewing site:
In total I spent about 15minutes clicking, and keeping myself entertained until I wanted to see more.