"The use of digital tools must support the children’s learning processes and help implement the principles of the Framework Plan on creating a rich and varied learning environment for all children." - Rammeplanen, 2017.
Using digital tools in kindergarten can be an alternative to more passive media use; the child goes from consumer to creator.
Explore the app by yourself in advance so you are prepared for the activity.
Consider combining apps to create new expressions.
Lock the screen on the iPad so that other apps cannot be used.