I put olive oil on the popcorn first, make sure it's nice and coated and then sprinkle on a mix I previously stirred together in a little bowl:
1/2 teaspoon Chicken Bouillon powder
shake in as much of the following as I want:
Italian Seasoning (usually more of this than the others)
Cinnamon (couple shakes)
Taco Seasoning (or any other kind of premade seasoning mix - the Chili flavor packet from Top Ramen is good) about a teaspoon, maybe
And finish with a lot of nutritional yeast.
Stir really well. I use the end of a wooden spoon kind of like a pestle in the bowl to break up the nutritional yeast flakes.
I'll pop a cup of popcorn at a time and put on maybe 1/3 to half a cup of seasoning. I made it last night for dinner. It takes about a minute to do the seasoning mix.
There's a distinction between child-ish and child-like. So far I haven't seen anyone say they enjoy anything child-ish (except maybe alternative song lyrics?), but all the lovely child-like responses warm my heart. I eat "sugar cereal" for dessert. Because I'm an adult and I can. Also, I make up silly songs all the time and talk to myself and my cats in silly voices.