Reviews: https://community.theasianparent.com/q/mother-staying-around-tiongbahru-have-reviews-world-preschool-infant-care/1735452
There's one at alexis, redhill area, heard not too bad. got 1 or 2 at bukit merah central, above kfc.not sure reviews
Try team student care at maritime house, opposite Pinnacle. Heard very good reviews http://www.enrichment-team.sg/