Is there anything to worry about here or is it simply just the fact they like this particular line and it pops into their head so they just sing it?
In this case it's the " E, I, E, I, O" from old Macdonald's farm!
Like if he's getting dressed, or like right now having his lunch with DH I can here him just randomly say it.
I know I could just be overthinking this but it seems like a "tick"
Or is this normal?! Sorry first time mum. He's 21months old