Spanish Tutor for Child (Bogotá)

Hello everyone -- My family and I moved to Bogota in July. I have a six year old son who is in first grade and is currently learning the language. He understands a good bit but is very shy about speaking Spanish. His teacher recently informed us that he is beginning to try to speak Spanish to the kids on the playground but still refuses to speak with her.

I am looking for advice/suggestions about a Spanish tutor for him so he can be better prepared to begin school again in late-January after the holiday vacation. Since he began this school year part way through he is being treated as an exchange student but will be enrolled as a normal student at the beginning of the next school year in January. Any advice/suggestions/feedback that anyone has is welcomed!!!

Thank you in advance!
Andrea