Baby companies give out a ton of free baby samples but only if they know you're out there and have a baby. If there's a company that makes a baby product you'd like to try, you should visit their website and register your information with them. This way when the baby companies decide to send out free baby samples, they'll automatically send one out to you.
I was recently turned on to dry shampoo as a way to keep my hair from looking oily between shower shampoos. My hair tends to be oily and is dark brown. All of these dry shampoos are great, not only because they are talc free dry shampoos made in the USA, but also because they leave your hair smelling and looking great. There's no grayish hair look from these powders.
Traditionally, baby powder was used on babies to keep their bottoms dry to prevent diaper rash. This was especially important before the development of disposable diapers, which lock the moisture away from the skin. As well as being used for babies, many women through the years have also used it to keep themselves feeling dry and fresh through the day, and to prevent chafing.