Bag of Epsom salt Box of baking soda Bag of ice cream salt Essential oils or cheaper version Found oils at the dollar store or Walmart. These oils are not organic and say they may be a skin irritant but they are diluted by tons of the softener, lots of water when you wash and soap. And you use approximately 30 drops, weigh your options here. I added food coloring 3 drops to color them. I also use scent crystals in my cool mist humidifier and wax warmer. And I'm mixing it with the soap when I sell it.