In laymans terms, How would you describe what a photon is?[?]
I would probably describe it as a Quanta (package) of electromagentic energy.
thats ok...as long as you ignore the spelling of 'electromagnetic'
Okay here is another ver.
When a light travels it has properties of rays and whenever it interacts with some obstructions etc we explain it with particle theory of light i.e. photons
Separate names with a comma.