Like a toddler’s patient parents mimicking airplane sounds and motions with broccoli florets speared on the end of a fork, they set out to get the entire city of Worcester to “open wide.” Any parenting veteran knows the challenges when it comes to developing healthy eating habits in a youngster –– never mind an entire city. But 49 years ago, Albert and Magdalena Maykel, the owners of The Living Earth Natural Market & Café at 232 Chandler Street, set out on their demanding mission. They believed that people would eventually grow to both understand and appreciate the value of proper, quality nutrition.