I have skipped, with a due amount of guilt, every single science experiment in our book. Until today. To make sure I did it, I called a friend of mine who has not one, not two, but three boys. I invited them over to do science with us as long as my friend provided lunch. She was more than happy to trade lunch for a half a year's worth of solar system science experiments.
We did relative size of the planets (Earth is a tic-tac; Mercury is a sprinkle; Neptune is a jelly belly, etc.), we melted chocolate with magnifying glasses, made craters in flour and demonstrated a solar eclipse in the bathroom.
And then, just for fun, we made a salt relief map of Ethiopia. I stopped short of requiring the kids to make a salt relief infant in the capital city.
Guilt gone; headache abating.