For a fun twist on science, when my older girls were in the upper  elementary grades (they are 3 years apart), I would have them research a  science topic of their choosing.  The only condition was that it had to be scientific, and they had to learn new things. 

Then I would give them a choice of ways they could present the information to the family.   Skits were their favorite way, but they also did a news report one time, posters, a puppet show, and essays. 

Years later, they still remember those presentations and the science behind them.  They had loads of fun working on the projects  together.  We carried this over into high school sometimes, too, but then they were assigned a specific topic.