All you need to get started is a good sharp grafting knife and willingness to experiment. An easy way to add a branch The simple technique shown here allows you to keep the roots of the scion until it takes; an obvious advantage. The scion, aka the branch to be, will remain in its pot until it takes. The part you want is the branch growing off the right of the trunk. Notice the slit (notch) to left of that branch.
In this simple and clear video, Brent Walston of Evergreen Gardenworks provides an excellent lesson in grafting scions onto root stock. In this case the scion is a Japanese black pine varietal called Hayabusa (Pinus thunbergii ‘Hayabusa’), which is a dwarf cork barked cultivar (nishiki kuro matsu) with very dense foliage. The root stock is your basic Japanese black pine (Pinus thunbergii). Brent uses Japanese black pine as stock for a number of black and white pine cultivars. If you want to try your hand at grafting, you’ll need a sharp grafting knife and some grafting tape.