We do the same as Angie - not until Christmas eve night. Why, you ask? Because I was that kid who stealthily opened ALL of my packages whenever the parents weren't around and neatly wrapped them all back up so they wouldn't know.

Those I couldn't neatly wrap back up I blamed on our cat. I had no surprises come Christmas. So I'm not giving the boys the chance.

Besides, if I keep them hidden until then I can continue to tell them that if they don't behave then Santa or mommy & daddy may not bring them many presents.

It's a great bargaining chip - for a few weeks, anyway...