1/4 cup dried lavender flowers
1/4 cup instant powdered whole milk
1/4 cup oatmeal
Place into a muslin drawstring bag. Toss the bag into the bath water as it's running. You can also use the bag to rub your skin as you bathe.
You can also make your own variations of bath tea with assorted fresh or dried herbs. Place a cup or so of assorted herbs into a bowl and add 2 cups of boiling water. Let this steep for 10 minutes, strain and add to your bath as it runs. These amounts are estimates; feel free to experiment until you find a combination that works for you.