Wondering what a cheeky little tank engine can teach our kids about science? With STEM learning stations and opportunities for developing social skills, the Thomas & Friends: Explore the Rails temporary exhibit at Boston's Museum of Science is a sneakily educational outing that children will experience as just plain fun. In a city filled with fun museums for kids, I recently chose to bring a preschooler and a toddler to this new exhibit at MOS, and I was so glad I did. The kids came away from the visit with new knowledge about train engineering and history, and an even deeper love for Thomas.