In our ward a few years ago, a CTR 5 teacher did a cute sharing time presentation on choosing the right. 
Maybe you could adjust it to fit the theme.

She had paper fish in a bucket and had children from her class take turns fishing with a fishing pole (using a magnet on the fishing string and paper clips on the fish).

Once they caught a fish they read what it said - either something that is choosing the right or NOT choosing the right.

She asked the children if that is a good thing or a bad thing. If it was a good thing, another child in her class clipped the fish to a long fishing line hung up on the blackboard. If it was a bad thing, or bad fish, she had the child put the fish in the garbage bucket to the side. It was a very simple sharing time, but effective and the sweet little primary class all participated and loved it.