This children's Bible song is all about God's nature - as seen in the pages of the Bible, God is all-knowing, all-present, and all-powerful.
So for example, Jesus knew all about Zacchaeus before he mets him (Luke 19:1-10), he promises to be with his followers always (Matthew 28:20), and he raised the dead, calmed the storm, and can forgive the sins of all who trust in him (Mark 5:40-43, Mark 4:35-41, Mark 10:45).
We use posh words for these characteristics - God is Omniscient, Omnipresent, and Omnipotent - and that's why this song is all about "Omni!"
It's on the jukebox for you to listen to. You can also download the full track, backing track, and sheet music (that's free) from the store. I'm working on a yt video...