GymbaROO for babies 6 weeks to toddlers 5 years old. One free class for babies and crawlers. Baby ROO� classes from 6 weeks to 14 months. 6 weeks to 5 year olds. Research based programs. GymbaROO trained professionally qualified instructors. Weekly 45-50 minute sessions, parent handouts and home activities. The best decision you'll ever make for your child's future. Australia wide 12,000 children attend a GymbaROO class every week. GymbaROO is an Australian based program designed to give you the opportunity to learn how to provide activities at home to help your child learn about their world and get a jump start on their education. The program specifically targets the stimulatory needs of babies to help lay a solid foundation for ongoing development of the brain.