To say that 3-year-old James Davern loves his Thomas the Tank Engine toys is an understatement. "For his first two years, he didn't play with anything but trains," says his mother, Heather Davern.

Since 1942, Thomas the Train and his friends have been an integral part of many childhoods. What started as a toy tank engine named Thomas became a published story, and the rest is history.

A bubble train for babies and toddlers is the next big toy trend after a seller revealed it is selling one every minute. After a rave review from a parent vlogger, a light-up train that plays ...