When making stop motion video, how do you make something look like it's flying through the air like a ball?

My son is learning to make stop motion videos with clay and we can't figure out how to make an object look like it's flying through the air like a ball being tossed back and forth between 2 people. We are using a VHS video camera. Can anyone give us some pointers? Thanks to all!When making stop motion video, how do you make something look like it's flying through the air like a ball?One trick Cohen used for this is to use different heigt plexiglass square rods. Basically, if the sides line up perfectly with the camera lense, you will have the illusion that there's nothing under the object resting on top of the rod. Your lighting needs to be controled though.

There's always the alternative to use fishing line :)