Ninja Academy Ninja classes are a fun, fast paced combination of obstacle course work and tumbling. Ninjas work on hand eye coordination, cartwheels, flips, and jumps. This class is currently offered for ages 5-8. Classes are $55 a month. This class will show as waitlist only until there are 8 students on the waitlist. Parents, please enter your Ninjas on the waitlist. You'll be contacted when class is available.