Following fixes and improvements have been suggested by @echarruau :
Fixes needed:
1. Left part of some elements' text can disappear when expanded. The whole grid of elements can be centered.
2. When expanded, the image of n element is overriding the element in upper row
Improvements:
1. Let there be a choice to choose from capital/not capital letters
2. Create separate easy mode for pre-school children with less words