Harry, 6.5 months old, using an iPad 10.5” (2017)

For reference, here’s my child using the iPad at 6.5 months of age:

At this age, his motor skills were not good enough for touch UI in general but he immediately picked up how to use this specific application.

One thing I was not aware of when I wrote the project specification, is how much infants want to use touch (fingers, hands) to explore things. Even if they would be able to use a gaze-based UI, they might not accept a hands-free interaction.