This year, we're trying lots of hands-on things. Since making my own laundry detergent is something I routinely do, I decided to get the kids involved for some simple science. We had lots of fun with this practical and frugal experiment.
Freecycle); Borax; Super Washing Soda (not to be confused with baking soda); and the hard-to-find Fels-Naptha (ironically, when I went to make this last week, the Fels-Naptha was the only ingredient I had on hand).
In fact, it was so hard to grate that I ended up shaving and crumbling it with a knife. Now, why hadn't I ever thought to do this before? I also think it would have worked to whir it through my mini-prep Cuisinart blender, but I cracked the top to it and it no longer works.
Last of all, they each tried stirring the liquid, which gels in about 24 hours. Mama has fresh detergent, the house smells good, and the spark plugs had fun, all for little cost out of pocket. That's my kind of learning!