ScrubIT (filters pr0n, so probably not what you want): "ScrubIT offers clean, reliable, and speedy DNS service FREE of charge. Our filtered DNS scrubs out the bad stuff and is absolutely simple to setup and use. Try it today!"
* 126.96.36.199 * 188.8.131.52
OpenDNS (you'll get ads on DNS misses): "Taking a few minutes to unbundle your DNS service from your ISP's Internet connection means a safer, faster, smarter and more reliable Internet experience for everyone in your household."
* 184.108.40.206 * 220.127.116.11
vnsc-pri.sys.gtei.net (no idea who or what this is; but their DNS sure is open):
I agree that an 8 year old should have no expectation of privacy. I'm mostly thinking towards the future and the fact that they will accept monitoring that starts at 8 or 9 much more easily than monitoring that starts at 13 or 14.