Both DS(11) and DD (8) got wands from the stand outside of Hogwarts, we have a "He who should not be named" and a Hermanie wand and they have spent hours casting spells at each other, the dog, even the neighbours from behind the curtains.
That was last October 2010 and they are still using them now. Enjoy!
42 weeks till our next US & IOA trip - and counting!