I saw these wonderful topiaries in a store window and am attempting to recreate them...I have the styrofoam ball, the sturdy 3' stick, and the 10" pot...I cannot think of what to add to the pot to give it some weight so that the topiary will not topple over. I had planned to add a cardboard "sleeve" to the rim of the pot and on top of that maybe add 1-2" of spray foam insulation and press some moss into that, but I really can't come up with a practical solution to my "weighty" problem...