I've been making tub teas as gifts. (Thanks to Sweetcakes for the recipe!) Tub teas are herbed sachets that can be floated in the bathtub. Here's the recipe:
1.5 parts Oatmeal (pulsed) - I used 3 cups
1 part combined herbs - I used 2 cups combined of calendula, lavender, and lemon balm
Mix thoroughly and spoon into unbleached disposable tea bags. Add a string and double-fold, then sew across the top. Alternately, package in pretty jars and give with a reusable cotton tea bag.