Forest

Ben showed us this revision App he'd downloaded on his phone today.   For every half an hour of revision you 'plant' a tree, which slowly grows for the duration.  At the end of the half hour you have a tree to add to your forest.

And the clever bit?

If you use your phone in that time, the tree will die!

What a splendid idea to focus the mind and discourage phone distractions.  Ben grew 7 today...