tea dying is a fun, inexpensive way to give fabrics an antique, natural look and a great hands on, creative activity to do with children (with very little clean up/mess!)
First of all know that tea dying is semi-permanent, so while you can remove the color with bleach, it won't wash out so be careful. Also, only natural fabrics (ex:cotton, linen, etc.) will dye, synthetic fabrics will resist the staining effect.
Also, be warned it's difficult to get an even dye across one fabric since certain areas will be more concentrated than others in the dye mixture, so make sure you practice before you try this on a garment you really like!
*To stain the item, bring 4 cups of water per yard of fabric to boil. After the water has come to a boil, remove it from the heat, then add 2 tea bags per 8 ounces of water, or more, depending on how darkly you would like the fabric dyed. Experimentation is best at this point. Leave the tea to steep for approximately 5 minutes, then remove the tea bags and place the article to be dyed in the water. If you would like a mottled effect, don’t move the article at all in the water, however if you would like a smooth even dye all over, swish the water around for a few minutes to cover the article evenly.
Once you’ve dyed your cloth or yarn to achieve the look you want, remove it from the tea bath and rinse it under cold water until the water runs clear. You will lose a lot of color doing this, so if it turns out too light for you, you can soak it longer until you achieve the desired effect – you can even soak it overnight for a dark brown color! Once you’ve achieved the look you desire, place the yarn or fabric in the dryer and tumble dry.