When dry remove the cling wrap...place your stencil where you want it. Squeeze out some gesso or thick acrylic or tempera paint on a palette.
Using a round brush pounce on the paint holding your stencil....you can tape it into place with some painter's mask to make it easier for the kids.
You are trying to get some good texture for that furry coat.
Set aside to dry.
With the contact paper one you need to remove your "sticker".
Then add an eye, nose and some shadows to define the bear.
For the stenciled ones...you add eyes, nose and shadows.
And that's it...in reality these bears would probably show up as only silhouettes at sunrise or sunset but I wanted to distinguish them from black bears so you have to imagine there is a light source from behind the viewer as well.