Note: This may not always work. Not all cacti may be compatible and sometimes by attempting grafting you may harm one or more of your cacti. You are solely responsible for damage and injury caused by this instructable.
Step 1: Materials
-A sharp knife (be careful with this)
-2 (or more) cacti
Step 2: Grafting
Step 2: Make a cut in the cactus you are grafting onto (Image 2. Sorry but the picture of the cut got lost somewhere). Make sure this cut is clean as well. Make it deep enough so you can get a centimeter or two of the cactus 2 in it.
Step 3: Insert the part of cactus 2 into the cut and let time do its work now.