Molly squinted through the peephole of the door, her heart thumping in sync with the thumping rhythm of children's laughter inside. "Alright, Bill, this is it. Operation Birthday Surprise. A heist like no other." Bill fumbled with the map, his face contorted in concentration. "You sure this is the right place? I don't want to break into an opera party." Molly rolled her eyes. "Yes, Bill, this is the right place. Remember? Little Emily's seventh birthday bash. The most prized presents won't just fall out of nowhere. They're hidden beneath a pile of tissue paper and fluffy plush toys." They pushed the door slightly ajar and peeked inside. The sight was a cacophony of colors - balloons bobbing mid-air, streamers curling around like ivy, a banner at the front reading "Happy Birthday Emily!" Her eyes darted to scout for obstacles. "Listen, Bill, I'll handle the bouncer. You keep an eye out for those..." Molly paused, seeing an oddly large gingerbread house at the far end of the room. "Gingerbread house?" Bill asked, his eyebrows shooting up. "I did not sign up to deal with edible architecture." Before Molly could protest, Bill was already making his way towards it. "Think we could get a piece of that house as part of our...birthday surprise?" With a sigh of exasperation, Molly scanned the room once more, mentally flagging the clown machine. "Fine. But remember, the plan is to be swift and silent." Just then, Little Emily blew her party horn, a shrill note that made Molly jump. Bill chuckled. "She's all gung-ho about blowing that thing. It's like a ticking time bomb." Molly lightly tapped Bill's shoulder. "Enough chat, time to make our move. Emily won't blow her next breath for presents unless it's too late." Bill nodded, looking back at the gingerbread house one last time before joining Molly at the doorway. They exchanged a determined glance and scurried in, blending with the bumbling crowd. "Boy, these kids are rambunctious," Bill muttered as he dodged a running circle around his ankles, a little girl dressed as a pirate. "And those party games," Molly added, watching in horror as the children engaged in a chaotic session of "Pin-the-Tail-on-the-Donkey". "I think we need to revise the plan." Bill's eyes widened at her suggestion. "Now? We're in, Molly! Can't back out now." Molly grimaced, but nodded. "Got it. Operation Birthday Surprise v2.0." They quietly made their way through the party, evading small feet and loud laughter. As they neared the buffet table, Bill's eyes widened. "Molly, what's that?" She peered over to a corner where giant chocolate coins were stacked. "Oh, that’s a philanthropist's dream. But...it's not part of our mission. Focus!" Bill hesitated, but she was right. He glanced at the organized pyramid of presents under the magically indestructible balloon arch. "How could we possibly pull that off?" Molly smirked, "That's what we're supposed to find out, so let's get a move on." As the party climaxed and Emily prepared to blow out her candles, Molly and Bill contemplated their playful plan. The stakes were high, but so was the thrill. After all, what was a heist if not a daring affair?