Drag things on black boxes and see what happens! Ok, instead follow the book instructions. i may or may not make a new one, this is so old lol
Most books aren’t interactive. This one is, and it exists because I wish books weren’t static. And, some people think a interactive book is a giant picture with some text. That’s not what I would ever think of. Others think it’s animations(including my dad). Some people also think that you have to think it and image it. Imagination isn’t always perfect. Also, here, you don’t have to see the very useless and for computers symbols(http://worrydream.com/LadderOfAbstraction/). Yes, you can reason and analyze it, but in a 2 body system I already can’t remember the equation. Step it up, writers. If you somehow want to see symbols, look inside. I said for computers. i really should expand on this topic someday #ExplorableExplanations