With the appearance of the Memory4Kidz app in BlackBerry App World, it seems as though BlackBerry PlayBook apps are starting to be accepted for BlackBerry App World. Memory4Kidz was posted on December 23rd. It is a memory game for children to explore colors, numbers and shapes. There are a few screenshots of the game. App World shows the required device software is OS 6.0.0 or higher, but likely refers to the QNX OS that the PlayBook runs on.