My niece joined Tree house playgroup last year and since has been smarter everyday. And I haven’t seen her mother being forced to send her to playgroup, unlike my neighbor’s kid who throws tantrum. I believe they don’t enforce knowledge on kids, instead teach them a fun way to learn things.
And they’ve many staff members and teachers to look after small groups of kids. The curriculum includes lots of fun stuff which make your children the smart kid among the group.
Even the stuffs other than studies like team building games are very well planned for kids. They keep small events to engage kids in creative stuffs and make their stage fear go away. And they are always safe inside the building and you can concentrate on your work worry less.
Before making any decisions though, meet the teachers at the branch and get a detailed knowledge of how they’ve planned curricular and extra curricular activities for the children.