Phineas and Ferb's Summer Vacation Summerizer is an online game currently being run at the Disney Channel US and Disney XD US websites. It began approximately June 1, 2010. The end date is currently not known.
Phineas and Ferb have expanded on their backyard beach and carnival by creating a play field that visitors can customize. Characters and objects can be placed on the beach and adjusted as needed. Use the Summerizer controls to move left and right along the beach, and to zoom in towards distant objects.
Hidden items can be uncovered by adding objects to existing characters or other objects. New objects are added each week on Friday, determined by votes from the previous week. In addition, sending an e-mail to a friend with an invitation will unlock a new object. The first month was backyard beach, and the second month is now replaced with a carnival.
Each person's beach is stored on the Disney servers, so they can visit either the Disney Channel site or the Disney XD site and they will see the same beach.
If the web browser's cache is cleared, they will not lose their work.
The beach is independent of the web browser being used. This means that a person will see the same beach if they use Internet Explorer, Firefox, Opera, Safari, etc.
Untested but likely: using a computer in a completely different location may create a new beach.
Reports are coming in that some items are only available when visiting the Disney XD site and will not appear when visiting the Disney Channel site.
Since computer viruses and other malware can be sent by clicking on links sent in e-mail, you should tell the person that you actually did send them the invitation to visit your beach.
At the bottom of the e-mail that is sent, there is a notice about unsubscribing to e-mail from Disney Channel. This may indicate that sending the invitation also adds that e-mail address to other Disney Channel communications.
As of July 2nd, there is a new carnival activity, but you can still access your beach.
With the update of the carnival, now in the beach and the carnival you can ask for hints on what items to combine. They also have a symbol on the bottom right hand corner of an object that tells you that this item can be combined.
On July 9, it is said that they will begin adding video trivia questions to the backyard carnival.