The sound of an approaching Bobby Car is unmistakable. The plastic toy car’s wheels scrape across the floor unforgivingly as the toddler driver pushes their feet into the ground as hard as they can. Bobby Cars have been a favourite among kids in Europe and beyond for decades. The little four-wheel plastic cars were first presented at the Nuremberg toy fair in Germany some 50 years ago. Since then, German manufacturer Big has produced more than 20 million units. The company currently makes about 2,000 Bobby Cars per day – going far beyond the classic red model with the white steering wheel. So …