Complete the summary using the list of words/phrases. Choose the correct word and move it into the gap.

Problems for preschool users of video games

Preschool children find many electronic games difficult, because neither their motor skills nor their [1] are sufficiently developed.
Certain types of control are hard for these children to manipulate, for example, [2] can be more effective than styluses. Also, although they already have the ability to relate [3] to real-world objects, preschool children are largely unable to understand the connection between their own [4] and the movements they can see on the screen. Finally, very few preschool children can understand [5].