This was my second time dyeing a bag from a craft store -- it's really quick and easy, I recommend it to everyone!
Step 1: Needed Materials
*Something to dye
*Dye (both times I've used Rit brand -- it works wonderfully and it's the only dye I can vouch for)
The best place to do this is in a bathtub. The first time I dyed something I used a shower and water went everywhere. In a bathtub, the mess is contained and cleanup is easy.
WARNING: There is a chance you will dye the drain and/or surrounding area the same color as the dye, so make sure you can mess up the area you are working on. If this does happen, the sooner you clean up the dye the better. (Tilex worked, since I didn't have bleach handy.) However, porous surfaces will hold the dye -- I found this out the hard way, when not even pure bleach took the blue out.