Last Thursday was King's Day in the Netherlands, where a country-wide flea market is the centerpiece of the event. Thousands of people sell their old belongings for a few cents, while kids play music or do magic tricks to earn some money. If done well, it's a chance to make a good profit. In Amsterdam, prime spots on popular streets are reserved weeks in advance with tape and chalk. My oldest son, J, had reserved three spots, but unfortunately, the rain had washed away all the markings. Luckily, a friendly neighbor offered some space for our little stall.