"Glubble does a fairly good job of finding fun kids sites and
allowing access to them. Glaxstar has its own editorial department
that hand-picks the sites on the default access list. However, I
found that many of the games and animations on these sites don't
work in the Glubble interface, though they work just fine in
Glubble-less Firefox. What happens when you turn a young child
loose on a site like Barbie.com and she tries to play the games but
they don't work? She clicks on the pretty banner ads, and ends up
on an ecommerce site (strangely unfiltered by Glubble) trying to
input her name and mailing address."