"Jumping up and down the floor" - who jumps up and down the floor? A child playing!
It plays or imagines being an animal ("my head is an animal") or just imagines some scenes from lives of personificated animals.
So everything is happening in the song (=child's imagination) and can be interpreted quite literally - a family of animals, who have a son, and a lawn, a pet dragonfly, there are magic trees, "bad" bees, furry friends, etc.
My interpretation is quite simple:
"Jumping up and down the floor" - who jumps up and down the floor? A child playing! It plays or imagines being an animal ("my head is an animal") or just imagines some scenes from lives of personificated animals.
So everything is happening in the song (=child's imagination) and can be interpreted quite literally - a family of animals, who have a son, and a lawn, a pet dragonfly, there are magic trees, "bad" bees, furry friends, etc.