When your 5 year old insists he read the next chapter of Harry potter book 3. (He's already read Stewart little, Charlottes web and Indian in the Cubbard)

When you buy grade level workbooks (3 months worth) and they're finished in a couple days.

Your 5 and 7 year old are proud to take a pencil with 50 digits of Pi to school on March 14th.

The science center staff know your kids by name and always pick them for on stage demos.

Your kids routinely score 30-50 points higher then what is required for 99 percentile (map test) and the teachers stare in awe as the kindergartener blows through word problems and multiplication.

When you're trying to teach at grade level math to kids in 3 grades ahead of your own kids and they are completely lost...but your kids picked it up in one night.

When your 5 year old watches tutorials on Lego.com and the next day proceeds to build that item block for block with not direction booklet.

Second grader has to reassure his class there are actually FOUR states of matter. Aka plasma. (Makes you wonder where they find these teachers!)