If you are interested in learning how to crack a whip you will need to buy one first if you don't have one already. Nathan sells whips at an affordable price and he makes them in different sizes.
His number one supporter is Teaching Treasures Publications who also provides their online payment processing account and packaging department for your orders.
If you are after a whip that is not mentioned in Nathan's products or you want some minor changes made, such as a two tone thong, patterns in the handle or a shorter or longer handle, then e-mail him from here or from his web site and he will get back to you with a quote.
Visit tubewhips' shoppingcart: http://www.tubewhips.com/products.html