This is a very funny song I learnt about through David Deubel. I think it can be suitable for lower level students (Básico 1 and Básico 2) to consolidate the basic English structure for statements:
Subject + Predicate
Mr Morton smiles.
Mr Morton winks.
Mr Morton waves.
The video shows a lot of visuals which can help you with comprehension and vocabulary.
Find more videos like this on EFL CLASSROOM 2.0
As David suggests, if you wish you can watch the original version of Mr Morton.
You can read the lyrics for this second video here.
As a follow-up activity, after you finish watching the video, try and retell Mr Morton's story.