I have. In fact, I posted in detail about it back in Aug 2005: http://slashdot.org/comments.pl?sid=158055&cid=13241557

I'd submitted a fair, honest, but harsh review comparing 2 different modems I'd purchased -- 1 great, 1 lousy. NewEgg rejected my review of the lousy modem and took my review of the great one. I couldn't see any point where my rejected submission violated any of NewEgg's guidelines (included in that post).

I even went so far as to "soften" the language of the harsh review and re-submit it, but it was also rejected.

I like NewEgg but make no mistake about it -- they are (or at least were) filtering bad reviews to some extent.

Check your local planetarium, if possible. They often have shows geared to younger children.

I took my niece (then about 6 years old) to one a couple of times after she showed interest in star-gazing. I think these days, she (now 9 years old) might be better than me at picking out constellations!