You are looking at a collection of Domino Trees which when lined up and stroked fall as if deforested. The trees are definitely cute but the message it sends across is indeed of grave importance.
Just like felled trees make a permanent gap in the environment, these little trees also do not line up on their own until done by the user to enjoy the second phase of play. The objective highlighted is afforestation or precisely planting new trees for those felled.
The Domino Trees by Bobby Petersen come in a set of 15 and are available for sale. “20% of the profit is donated to WWF for forest protection and replanting.”
Watch ‘Making of Domino Trees’ in the video below.