A/N: I changed Loki's and Thor's ages around here to fit the prompt.
Prompt: Imagine your OTP around ten or eleven years old, at a barbeque or bonfire roasting marshmallows & making s'mores. Person A spends 10+ minutes attempting to make a perfectly golden marshmallow for Person B, only to have it catch fire. Person A precedes to get fairly sad about, while an oblivious Person B, thinking it was just a marshmallow, comforts them. When Person A breaks down and tells Person B it was "a gift because I Like like you," Person B giggles before kissing Person A on the nose and tells Person A that they actually prefer the marshmallows burnt.
It was another one of Howard's business parties, only this time, Tony was aloud to attend. Howard had walked into Tony's room at a random time yesterday and announced Tony was old enough to get used to the posh life style, Tony didn't object. He also warned Tony that it was a barbeque party and not to go anywhere near the open fires. Not like he cared, he just didn't want his heir hurt.
Tony Stark was 10 when he went to his first business party and one of his fathers associate's, the Odinsons' he recalled, had just arrived. They had also brought their youngest, Loki along with the older brother Thor.
Tony followed his dad when he went to greet them. Tony already knew Loki from the school they attended and were actually friends so naturally when he saw Loki, he grinned wildly. "Mr Odin, Mrs Odin, it's lovely to have you here." Howard greeted with a fake smile, "And and, Thor, is it?" Howard asked, holding out a hand from Thor to shake, Thor did so pleasantly. Thor was 15 now and Loki was 10, making the difference in ages quite obvious. Loki forcibly smiled at Howard. even when he completely ignored him, if favour of introducing himself and Tony, "This is my son Tony who will take over the business when I'm gone." he had said and Tony smiled as well and shook the hands offered, "We better get back to the party, come along Tony." Howard said and placed a hardly gentle hand on Tony's back, pushing him away from the Odinsons'. Tony looked back at Loki sadly, wishing he could play with his friend.
Howard disappeared from his side as the Odinsons' had been the last to arrive, Tony quickly moved to the side, not wanting to get in any ones way. He looked around for Loki but couldn't spot him, with a sigh he quietly resumed mingling with a polite nod of his head or a short answer when anyone asked him a question.
Loki, on the other hand, had found on the of barbecues and a pack of marshmellows. He grinned and put two on the sticks set out for use and started roasting them, one for him and one for Tony. He was sad he didn't get to talk to Tony, of course, but he supposed Tony would find him sooner of later.
After a while, he felt his eyelids drop. He was very warm by the open fire but he forced himself to stay awake and keep an eye on the marshmellows. Soon enough, though, he fell into a light sleep.
That was where Tony found him. Tony spotted Loki lying by the fire and thought he had hurt himself, he excused himself from the conversation (He was hardly being payed attention to anyway) and hurried over to the fire. He placed a hand on Loki's shoulder and shook Loki, "Loki! Loki! Wake up, if my dad finds me or you by the fire he will kill me and take you to your dad." Loki grumbled but opened his eyes groggily, "Tony?" Tony grinned, "The one and only. Now come on, get up." Loki shot up suddenly and glanced at the fire, "Oh no. I burnt them!" he said, tears gathering in his eyes as he pulled the two sticks with marshmellows on from the fire, "I'm sorry Tony! I didn't mean to burn them!" Tony blinked, confused, "Why are you sorry? It's just a marshmellow and I'm sure we can get another two." Loki started up at Tony, "I wanted to make something for you." he said, rubbing his hands together nervously, "And, I can do marshmellows so I thought you would like one. Thor says they are delicious." Loki stops speaking for a second before quietly mumbling something.
"What?" Tony asked, confused still, "I can't hear you." Loki smiles slightly, And it was a gift because I like you." Tony stares at Loki, shocked for a few seconds, "You like me? Just me for me not because my dad's rich?" Loki nodded, "You for you." Tony smiles, "Well it's a good thing I like my marshmellows burnt anyway." he said happily, pecking Loki on the nose, "How do you like yours? I can't cook them but I'm sure Mike can." Loki grins, "I like mine burnt too." They smiled at each other, "Why don't we eat them then?" Loki nods and both of them take a bite out of the marshmellows, sitting next to each other with their backs to the fire.