Is 4 too young to start a business? We didn't think so. Here is how our son is raising £500 for his first 3D printer - one planter at a time. A few weeks ago, our four-year-old came to us and said he wanted to start his own business. He wanted to sell planters. Real ones. To real people! Let me rewind…This idea hadn’t come out of nowhere, and as a mum, we become pretty good at working out where our children’s wild and whacky ideas come from. A few days earlier, we’d been out