M.B.
Jess...... she is talking about the Sweetgum tree..... Liquidamber styracciflua... a very pretty tree, with beautiful autumn foliage.....
Unfortunately, it produces these horrendous seed balls that are rather painful to step on.
http://en.wikipedia.org/wiki/Liquidambar_styraciflua
I have no idea if these products would work, and I don't know anything about "Nut Wizard", but this ehow article does mention using growth regulators to at least reduce fruit production.
http://www.ehow.com/how_###-###-####_sweet-tree-stop-prod...
Here's a suggestion.. I don't know how old your kids are, but pay them a penny each to pick them up for you.... another EHow article suggested selling them on EBay as craft supplies!
http://www.ehow.com/how_###-###-####_pick-gum-tree-balls-...
Good luck! My neighbors, growing up, had one of these trees.. and I remember stepping on the seed balls...ouch!