Shop Now: br Today, we're discussing one of those ingenious innovations that helps children cope with a significant life milestone: learning to walk. The Toddler Infant Walker Harness Assistant Belt, sometimes referred to as the Baby Walking Harness or Walking Assistant Trainer, will be the topic of our discussion. br You'll want to hear about this if you've ever stooped for hours trying to hold your baby's hands while they attempted to walk for the first time.