Bill and Molly crouched amidst a sea of discarded wrapping paper and brightly lit balloons as they plotted their heist. Bill's blue eyes sparkled with excitement while Molly's eyebrows were contorted into a puzzled frown. "Multiply the size of the toys by the exponents of the number of kids in attendance and then subtract the anticipated life expectancy of the venue, and we have the optimal time to strike," Bill explained, carefully calculating their chances. "Bill, I got all tangled up in your equation. Can we simplify? And how do we know these kids won't notice a bunch of thieves sneaking in?" Molly asked, trying to follow the complex logic. "Simple. We blend in with the crowd, brew a potion to make us invisible, and slip into the stash room while the birthday boy is shrieking with delight. The parents are all too distracted to notice anything astray," Bill answered confidently, swishing his cloak as he spoke. "An invisible potion you say? Sounds riveting. Though I'm not sure how it fits with my favorite disguise – the enchanted cloak of invisible color," Molly teased, flicking her own cloak about, revealing no peculiarities. "Color-changing cloak? Now, that's a stroke of genius!" Bill exclaimed, nearly dropping his pencil in admiration. "We'll blend right in. Let's just hope the potion doesn't backfire." Molly rolled her eyes good-naturedly but didn't dare scoff. "It better work, else we're just copying some amateur's mess-up party with ten stolen presents and a glued-together leg." "Agreed. Let's put the plans into action and hope for the best," Bill grinned. Molly nodded, a conspiratorial smirk appearing on her lips. With invisible cloak and invisibility potion in hand, they disappeared into the crowd, awaiting their opportune moment to execute their plan and add the 'most successful children's party robbery of all time' to their dubious list of achievements.