(ABCNews) - After Rob Thompson's custom road bikes worth thousands of dollars were stolen from his garage in Portland, Oregon, he filed a police report and put up several fliers in the neighborhood.

His 6-year-old daughter, Roxy, was no less upset and decided to give the thief a piece of her mind.

'It hurt my feelings that my dad was so angry and sad,' Roxy told ABC affiliate KATU-TV in Portland.

Thompson told KATU that Roxy first 'offered to give me her life savings; that was a heart-melter.'

But then Roxy came up with a better idea. She used her savings in the piggy bank to draw up a thief-shaming sign. 'She wants to let the world know it's not cool,' Thompson said.

'Shame on you bike thieves!!! Your mom would be so disappointed,' Roxy wrote.

'Sincerely. Resident 6 yr old.'

In addition to a few words of advice, Roxy also drew a sad face representing her dad and a broken heart next to it.

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'I want to tell all the people who steal things that it's a bad idea to steal things,' Roxy told KATU. 'Why do they even make villains in the world?'

The sign got a lot of attention, and a local resident who spotted a bike identical to Rob Thompson's informed the police. Police traced the bike to a person who said he bought it off the street for $50.

The bike was eventually hand-delivered to Roxy by the Portland Police Bureau. Several others are still missing.

'Six year olds can do amazing things. She [Roxy] was thrilled,' Sgt. Pete Simpson told KATU.

'It's empowering for her and she knows people do care and police were working hard to help.'

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