iPad 2 allows users to play slide show of the photos taken. The default time for playing each slide is set to 3 seconds. And using iPad 2 settings you can change the play time of each slide from the default time.
From iPad 2 home screen, tap the settings icon.
In the Setting screen navigate to Photos option and then tap the Play Each Slide for option.
Then select your preferred time period for Play Each Slide For.