Other than full immersion we believe this is the fastest way your child will learn. Of course, it also depends on the individual child’s motivation.
Children have an extraordinary language learning gift; as time passes, the gift goes away. Learning a new language now will be much easier and more effective than tomorrow.
You can watch this 6-year old boy's session. At the time of this video he had been learning for just over 6 months and had not had any exposure to Mandarin whatsoever outside of VivaLing.