This is a very simple song and activity which contains vocabulary about weather, as well as some use of 'can' and 'going to' (informally contracted as 'gonna'). There are also some adjectives and adverbs. The song is short and uplifting. It can be used with elementary students for the grammar and vocabulary, or even as a warm up for a discussion with more advanced students about the figurative meaning of the lyrics - overcoming hard times.