A collection of decorative soaps, commonly fou...
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I told my daughter-in-law I was starting a blog for mothers and grandmothers, loosely themed, “That was then. This is now,” and that I was going to include a Frugal Friday feature on cheap or free things to do with children and grandchildren. She immediately told me about the bathtub crayons she had just made by shaving old bits of soap, mixing them with food coloring, melting them and forming them into chunky crayons.

You can use the soap bits you have collected, buy ready-made soap for the purpose, or buy Ivory flakes.