Preschool...I cannot say enough about WeeWuns off of Cypress North Houston by Huffmeister. It may be a bit out of the way for you but they are well worth it!
Pediatricians, I LOVE the one I bring my children to. I use FM 1960 Pediatrics. They have branches throughout the area and include after hours and weekend "sick" appointments at some of their locations. The location I go to is in the medical professional building right there at 290 and Huffmeister (next to hospital). They are all very friendly there and between Drs. Tiffany Nguyen and Jennifer Trotter, I think most of my community is seen by them.
I've never dealt with Dr. Trotter but have yet to hear a bad thing about her. Dr. Nguyen is my favorite just because of the treatment she gives my children. She is a very petite woman and makes me, at 5'4", feel like a giant. I think my kids felt comfortable around her at first because of this. Once they got to know her, they loved her for how she interacts with them. She likes to know about the whole family, not just the child in question, knows who you are and your history just from walking in the door...not having to look through the file for the info, she is friendly and knows how to communicate with the kids. Mine are 3, 5 and 12. When the 12 year old asked if he needed shots before his exam was done, she chuckled, asked him if he wanted one, then told him to "go home". My 3 & 5 year olds fight over who's Dr. Nguyen she is. It's fun as you are bringing them to preschool each day!
There have been times I have needed a child seen quickly and she is just booked solid, the office gives me as many options as they can so my child can be seen by someone we are comfortable with and as quickly as possible. Dr. Nguyen passed by us on a very busy day, backed up, walked into the room with an inquizative look on her face to see what was wrong and wish us well prior to running off to her next appointment. My 5 year old was super sick this past winter with a fever that came over him VERY quick. Whe he went from normal to 105 fever within an hour, I called! They had me go to the Cypresswood location for the after care hours and because he was so sick, they kept him there for almost 2 hours making sure they tested what they needed, he got some of the medicine he needed and his fever was able to come down from such a high number prior to letting him go. I have total trust in this practice and would feel comfortable with taking any child there because the level of care has been great!