I fondly remember my Sci teacher solemnly giving us all a card as we entered the lab with a gene written on it. We were then told to breed with three others in the class and write down our offspring! When teaching inheritence, get kids to cut out pictures of different celebrities with different characteristics e.g ginger (chris evans) and blonde (billie) and mate them, and them get them to find their "offspring" in the magazines! HELLO/OK and HEAT would be particulary good for this! Might be an idea to check the content of the rest of the magazine though!