Use leftover plastic honey bear jars to store the bath crystals. It makes a cute colored bear with a smelly bell. After the fragrant crystals are in the bear, you'll find the kids sneaking into the bathroom when you aren't looking. That's why they're called smelly belly crystals. The Epsom salts keeps the water warmer longer and it helps soften hard water. Also useful to help relax wound up kids before bed. Epsom salt (pure magnesium sulfate) helps relax the muscles. Source: Unknown
Mix Epsom salts and sea salt. Add a few drops of food color for fun and a few drops of fragrance they love. Mix well to saturate the alt with color. (paste color works great for this). Add about two tablespoons per bath.