UI for this kind of thing:
	Nice detail:  A lot of times, the user is at least somewhat motivated
		Still shouldn't be hard to figure out	
	Non-technical users:  Yes, but generally they're at least clever
	Example:  Folks at UI and NIC

Two goals, which do compete:
	Easy to learn
	Easy for an experienced user who wants to be fast

Balancing these:
	Experienced user will use keyboard shortcuts
	Experienced user won't appreciate wasted screen space
	Cars don't have a label on the steering wheel

Do novice users want to be future experienced users?
	If so, they'll be willing to invest some time
	And we should help them!
	If not, we should help them finish and be done

Ok, more about details:
	Remember, we have an animation
	So there should be a draw callback!
	And if not, we can make an animation loop
	I didn't see one for TKinter, but there's a .after to schedule an update
	There's a mouse motion callback too

What to animate:
	Making a moving ball
	Adding something under the cursor
	
Lab:
	Depends where we get, a little
	It'll be a drawing thing, with UI