To celebrate Arbor Day, a company called “Knock” (I think it’s an advertising agency) has created a “We Heart Trees” site. Anyone can create a virtual tree, including “accessories” and a vocal expression, and you’re given a unique url to what you’ve made.

The company says it plants a tree for every virtual one made, but that commitment expired yesterday. It’s still an engaging site for English Language Learners – and others — to play around with….