The Saturday Happy Toddler class (Tuesday Happy Toddler class too) is the progression from baby class. We start dancing and using more complicated English.
From Happy Toddler class the next progression is our Kindergarten or Daycare service, or continuing on to Saturday First Step class.
My opinion of course is to get as much English as possible before primary School 小学 so the kindergarten is the best option, but that's not to say that Saturday isn't good just if you really want to get proficient in English you need lots of time in an English environment.
#little_lorikeets