Continuity mistake: J.T.T. is supposedly "getting back" at his brothers by scrubbing their toothbrushes in the toilet. He scrubs the green and yellow brushes quite vigorously inside the toilet bowl. Later on, when the three boys are brushing their teeth, J.T.T. is using one of the brushes that he put in the toilet.
Revealing mistake: When the boys go into the bear cave and all of the snakes are hissing, you can clearly see that one of the snakes is a rubber snake with a black stick attached to its head - the black stick is coming from a whole in the ground. It is not even a good snake, the 97 cent 'convenience store' variety.