There are many good websites which are specifically made to cater 6-8 year old children. Mostly the websites are associated with child learning and development.
Club Penguin
I have added a few websites in the related links below that I have found to be appropriate for children.
Girlsense.com is for girls between the ages 8 and10 or older your choice thank you good bye.
pbs kids.org club penguin Webkinz maybe cartoon network.com
Barbie.com, Webkinz.com Horseland.com Nick.com MoshiMonsters.com Neopets.com
cbeebies
dressupwho.com/
searching the internet i found ages range from 42 - 68
Stardoll: This website is usually ages 7-17 Club penguin: This is usually ages under 15, and this website is for girls or boys. Moviestarplanet: A good website aswell, I would reccomend for ages 7 or over. Also this website is good for boys and girls, maybe mostly girls. Poptropica: This website has a safe chat mode, and it is for girls or boys, and it is usually ages 6 and over Hope this helped! :)
I like the sites: http://www.mylifewithgod.webs.com http://www.sportsandgamesforgirlz.webs.com http://www.gamesrus101.webs.com These are awesome CLEAN sites for any and all ages!
No Second Life websites are currently available for children aged 11
A couple good websites that have directions on how to make Father's Day gifts are www.enchantedlearning.com/crafts/fathersday/ and www.makingfriends.com/dad.htm. Both websites have several great craft Father's Day projects appropriate for kids ages 3 to 9.