Kenny Crump started Gym Skills in 2005 after teaching a gymnastics class at a daycare center. Now, there are five brick and mortar locations.

Classes are broken down by age. Most facilities charge by the month for classes that range from 45 minutes to an hour. Some facilities offer free trials and some gyms have 10-month courses planned.

Your gym bag is your fitness tool box with accessories, devices and equipment all designed to help you get the most out of every workout. If you’ve been at this training game for a while, though, ...