Can I give gravel and Advil (ibuprofen) at the same time to my 2 year old child?

Huh? I'm not sure what you were asking. I'm sure you did not mean "gravel". However, for fever or pain, Ibuprofen and acetomenophen respectably are best and tried for many years. However, never give a the same time. I personally never recommend giving naprosyn (naproxen) to a child. You don't ever want to give naprosyn (naproxen) and Ibuprofen together. Combined will increases risk of stomach bleeds and kidney damage.
Not a good idea. I strongly recommend against giving your 2 year old gravel at any time!