10 keys $1.95
25 keys $3.95
85 keys $9.95
250 keys $25.95
600 keys $49.95
A parent account is necessary to buy keys. Whatever you buy with the keys is available permanently to that account. A premium account is also available for purchase, which gives you access to more of the site, although I couldn't find the place to purchase it.
Tiny Planets has a lot of different places to play and things to do. We explored it several times and I don't think we even scratched the surface. My kids mostly enjoyed the Labs, which is where the games are found. They were not interested at all in the "educational" part of the site. We had some difficulty finding our way around and the kids were very annoyed that they could not choose their own usernames. When asked, they said they enjoyed playing here, but it was not something they ever asked to play.
Sign up is free, however, so you can check it out yourself. Or you can see what fellow Crew members thought here.
This product was given to me free for the purpose of this review and all opinions are honest and my own.