Start off simple by stopping off at your local nursery and get your hands on three ficus benjamina no larger than 15 to 20 inches tall.
In addition, you'll need a 5 gallon sized container plus some potting soil. When you get home, trim off all but a handful of leaves at the top of each ficus. Next, slip each plant out of it is container and knock off about half the soil.
Here comes the tricky part. Start to braid each branch together folding one over the other until you get to the top of each plant. Secure with a twisty tie, repot the intertwined plant in a larger container then watch it grow!