Styling my sons hair. Help?

Marie

My 4 year old starts preschool soon, so I decided I should actually start styling his hair instead of him constantly having bed-head. Unfortunately I have no idea what I'm doing. I always joke that I don't have girls because I can't do hair, but here I am, doing hair... He got a hair cut today, he picked what he wanted. I'm looking to style them similar to these pictures, but have no idea what products are needed. Gel, spray, paste, cream, pomade, fiber? I don't know what most of these even are. The stylist spiked his hair with maybe a gel, but it didn't hold well, maybe because I don't ever do it? Any suggestions?