My son has very straight hair and his hair just falls straight down his forehead and looks messy.
Looking for a hair product for the morning when I comb his hair that will keep his hair in a side part.
I don't know of a product. But I know kids with similar that just wear it straight down and I think it's a cute normal hairstyle. Maybe keep his hair a bit shorter? Not the answer you are looking for but my 2 cents
Dipping do sport gel (highest level)
Usually does the trick.
Some prefer hair spray though-tresemme extra hold is great
Some guys have stick straight hair and nothing will do. Some times it takes months of training hair until it gets the point ro listen!