The eight-year-old boys started their crime spree on Tuesday, stealing toys worth around €180 from a shop in Kempten, southern Bavaria, police report.
Their strategy was simple. They smuggled their plastic booty via a lift into the shop toilet where they stripped it of its packaging and hid it in a rucksack before returning for their next trophy.
After everything went smoothly on Tuesday, they returned to the shop the following day, thinking Christmas had come early.
But this time the shop security cottoned onto them and watched as they repeatedly went into the lift carrying a toy in its box and came out with nothing. This time the boys tried to steal €40 worth of toys.
When the security team looked back at CCTV from the previous day, they confirmed that it was the same pint-sized thieves who had been pulling the wool over their eyes.
When police confronted the pair, they already knew how to react, claiming not to speak a word of German.
It was only when their parents arrived that it transpired they were actually fluent in the language.
Next, when officers turned up at their home to find the stash of stolen toys, the boys repeatedly tried to misdirect them.
Eventually they admitted that they'd hidden the toys behind a double wall in the attic.
When the police tried to explain to the artful young dodgers the error of their ways, they remained totally unimpressed, the police statement reports.