I would highly recommend Discovery school at Smithfield United Methodist in N. Richland Hills. They are having registration on Jan. 28th. I think they do enrollment by appointment.
They also have time set aside on Thursday mornings for prospective families to come and tour the school and see what the kids are doing.
Here is their website if you want to look them up.
http://www.smithfieldumc.org/discover.htm
They are absolutely wonderful. We have been absolutely thrilled with how much our 3 year old son is learning and how wonderful his teachers are. Last year I checked out nearly every pre-school in the area and this was by far our favorite. As a former teacher, it incorporates everything I learned about how pre-k programs should be run.
They also have monthly play dates outside school so the kids/parents can get to know one another. They also have an active PTA (if that is something you are interested it).
We plan to send our son next year for 3 days and our younger daughter for 2 days a week.
If you have any questions about the program, let me know.