my eldest (now 5) went for shichida from 6/8mnths to 3 years old while my second (now 1.7) goes for heguru since 6/8 months (cos the shichida centre near my place moved and was centralised at toa payoh which is too far for me). I attended both with my kids and I prefer shichida over heguru - for the only reason that shichida has a table and chairs concept whereas heguru doesn't (felt it helped my kid ease into traditional schooling easier). But the activities are pretty much the same - one needs to follow up with the kids (brain training at home using flash cards etc) to see any effect. ultimately depends on your preference ...