Thank you all for the responses, and Zimm frightens me.

We have hardwoods, those outriggers look like they would kill the floors. It was hard enough convincing the wife to spend $$$ on speakers, no way she goes for those.

I think we will try the "tacky" stuff solution. Speakers arrived at Texas depot, and we should get them tomorrow. Probably won't get to child proofing until the weekend.