there is smallworlds
No there is not but there are many fun games on other sites such as Zwiny Stardoll Meez IMVU Movie Star Planet Etc.
Imvu is for 13+ only
Club Penqiun IMVU
imvu and second life
Ummm...not like imvu, but tryIknowthat.comneopets.comclubpenguin.comthose are safe chat sites
find more sites like imvu like anamiros.com
imvu,buildabearville.com,weeworld,are a few sites sort of like zwinky.
IMVU and Wooz World
Love on imvu is just like eharmany, all those sites, but KIDS that play imvu think its all a game, so try to find someone that doesn't think that.
There aren't really any other sites that are like Frenzoo in the sense of the easy to use create tool and the flexibility of creativity and a great community, however, if you are looking for 3d avatars, Meez.com or IMVU are alternatives.
You really can't "control" IMVU unless you work for them, and even so you might not be able still.
Adventure quest worlds