Have you found Jeff already? 

Jeff travels in his cardboard box, the so-called 'Travel Box'. You can find him on several places in the Netherlands.

The fact is that Jeff travels in a cardboard box so he needs a little bit of help. The only thing you need to do is Scan the QR code with your smartphone and take him with you and leave him on another place so somebody else can take it elsewhere. When you scan the QR we can track where all the Jeff's are.