With a little cinnamon and clove from your spice cupboard, Baking Soda, Citric Acid and Orange Essential Oil, you craft the nicest bath bombs for under the tree. Experiment with silicone moulds that you like and that look festive. Go for stars, snowdrops or Christmas wreaths as in the example. Give the package as a recipe gift to someone to make themselves or make them yourself and wrap them up nicely in a jar for under the tree.