hey RC, if you want to make an ant go ahead..

or maybe an ant airship

What do you want to know about the CV curve tool?
It basically allows you to draw a curve by placing down cv points,a bit like connect the dots.
If you make an object live you can draw your curve to the profile of that object if know what I mean or to explain it another way the object becomes your canvas.
What you do with the curve is up to you , you could duplicate it and loft between them to create a surface or you could you another peice of geometry to to extrude along it ,you could use it as a path or you could do a revolve around it ect ect.