If you donate to CtB, I'd like you to get something in return, that's why you can get kits down below! If you'd still like to donate without getting kits, you can do so via PayPal:
Kit Packs provide you with a total of 4 or more kits at a discounted rate! And often, free kits are added to existing packs later as thanks for your support.
Kits can be purchased individually, though it is recommended to buy a kit pack instead as free kits are often added to packs over time.
Because the main point of kits is to help fund CtB and keep it alive, individual kits are priced as such, so that purchasing individual kits still helps!