What is a good glue to use, I have been using Aleene's from walmart. On and in all the instructions it says to use a low water content glue to prevent warping.
And in pics they use a glue stick.
So my question is, Is what I am using okay, and if not what should I use. My son and I build at least one room or building everyday. So I go through quite a bit. Thank you.

There are a lot of posts in the forums about types of glue. For example, and recently Browse around and read up, and you'll find plenty of discussions about different types of glue.

Personally, I've never used a gluestick. For large pieces, I use 3M Super77 spray glue. Goes on quickly and evenly, and doesn't warp. For smaller pieces, like tabs, anchors and gluing down the tiles, I use plain old Elmer's white school glue because it's super cheap -- offsets the cost of the spray glue! The key to using a glue like that is to use a *thin* layer. Really thin layer. And, only on small bits. If I were to try to spread it on a whole wall, I'm sure the wall would warp.

Other folks use glue sticks, glue pens, super glues, etc.