I can highly recommend this kindergarten, whether you live here or are on the longer holiday. Our kids to five years old, attended it for one month whilst we were in Phuket. Even though my kids didn’t speak a word in English in the beginning, they love the kindergarten from the very first day. After one month here, they could understand everything and learned many words and phrases in English, like names of days, months, colors, learned many songs. Above all They were happy in the kindergarten because of the amazing teachers and fun activities, such as arts and craft, and even swimming training once a week. I am myself from educational profession and have worked in several schools and I can tell the teachers here are really professional, and above that they really love their work with kids, that’s why they’re always happy. Always present with the kids, they Take great care and attention of their well-being and emotional state as well. During all day, parents get photos and videos from their daily activities and there is also an afterschool too for busy parents. The Director Stuart is amazing with everyone- parents, teachers and kids – he’s there all day, helping everybody and the kids love him. I wish all kindergartens were like this one. 
Olga Zen recommends Rainbow Montessori.