i dont know buster
I am not sure what you mean about make polymer clay with cornstarch. Polymer clay is a clay already made. You can use cornstarch to avoid other objects like stamps from sticking to the clay when you make prints on clay. You just brush it on with a soft brush. It does not harm the clay, and after curing you can simply rinse it off with water.
U can use flour and glue
You can use baby powder, flour, baking soda or cornstarch to prevent the clay from sticking to your hands. To make it hard, you may want to put it on the fridge but put it on a container so it's not gonna make your food "poisonus" i guess :D
yes
does chewing cornstarch increase weight if not swallowed
you can get water and cornstarch and mix it
No.
Get clay and make it"it is easy
Yes but it will make it thicker
Just put some cornstarch
You need to be a good with clay to make a model of Jaguar out of clay.
get lots of clay and make it into a bed.