With more and more of you logging on to virtual worlds, companies are working hard to make the best one ever.
But what would you put in your perfect world, and who would you most want to be in it?
Perhaps you'd be a wizarding wonder in a Hogwarts-style castle, or would showing off your skills on the football pitch be more your thing?
Would you build the house of your dreams, or hit the high street with wads of cash?
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"If I made a computer world I would make it really mad! It would have five countries and loads of space age cities with shops where you can get a job to buy cars and houses. I'd also have cars which hover!!!"
Jo, 9, Brighton, England
"If I made a virtual world it would be really different to the real world, there would be no laws of physics or gravity!"
Chris, 13, Wiltshire, England
"I would make pretend friends and earn money to buy food and stuff by getting a job."
Kiana, 9, Middlesex, England
"I would build my own little village and be completely independent. It would be like the village Tattoine from Star Wars."
Oli, 11, Derby, England
"My ideal virtual world would be as life-like and real as possible. We'd be able to stay at Hogwarts for lessons and have super powers!"
Mohsin, 12, West Yorkshire, England
"I think there should be Lego cars!"
Ben, 8, Manchester, England
"I would put a virtual school in mine because education is important to me!"
Chloe, 8, Birmingham, England
"I would put a pet shop, pet pampering centre and a big swimming pool!"
Gwyneth, 10, Dyfed, Wales
"I want a no-sister land where brothers can chill out."
Jonny, 10, Ipswich, England
"I think virtual worlds are terrible! A comment one of the presenters made, more as a joke, was something like 'maybe soon we'll be living more in a virtual world than reality'. It's downright wrong! We have a real world, we should live in it and make that one better rather than abandoning everything for a fake world."
Colette, 13, Hertfordshire, England
"I would like it if everyone sat on chairs that could move. There would be a big button in front of you and when you pressed it whatever you wanted would appear without you having to pay. That would be my perfect world!"
Eliza, 9, London, England
"I would put a Tardis and a massive TV in my world!"
Orin, 8, Norwich, England
"In my world if you wanted to see football all you'd have to do is type the name of your fave and most hated teams. Loads of other people could see the same match as well."
Tara, 8, Dublin, Ireland
"In my world I would have lots of animals made of sweets. I could eat as many sweets and chocolate as I pleased. I would stay up really late and watch TV."
Olivia, 8, Birmingham, England
"I would put a sports shop in mine because I love sport."
Cellan, 11, Dyfed, Wales
"In my world I would have a giant mansion and chocolate everything!"
Aine, 9, Peebles, Scotland
"In my virtual world I would put an ice rink and a clubhouse."
Rebekah, 8, Essex, England
"I would make a Lego world with mixed Lego sets including Star Wars, Spider Man and Lord of the Rings."
William, 10, Gloucester, England
"In my virtual game I would put Legolas from Lord of the Rings because he is so cool, and loads of Sand Troopers for the same reason."
Marley, 9, Wiltshire, England
"I would like my rabbit to be in my virtual world because she's dead, and if she was in my virtual world she would never age or die."
Megan, 11, Suffolk, England
"I would put anything my heart desired like invincibility and flying pig's LOL :)."
Greg, 12, Inverclyde, Scotland
"In my virtual world I would be a veterinary nurse and all you would have to do in school is mess around to get an A. Also everyone would be nice to each other and animals would be treated fairly!!"
Tamara-Jane, 13, County Down, Northern Ireland
"I'd launch a football style virtual world, where you would start off in your back garden and gradually get better. Once you were good enough you would get signed for a team's academy and eventually make the first team. If your stats were really high you'd get picked for your international team."
Callum, 10, Birmingham, England
"I would put a virtual pet shop in mine because I'm simply crazy about animals! I'd also have a mansion where me and my dream pets could live and in the garden I would have giant stables or maybe even a ranch!"
Zoe, 11, County Durham, England
"I would be a successful safari vet with a big mansion, lots of exotic pets, amazing furniture, and a beautiful garden!"
Amy, 12, Bouillac, France
"I would put a big palace for me and my friends to live in so we can see each other all the time."
Zara, 10, London, England