Drinking from a sippy!

Lately if Colin is crying in bed it's one of two things that is the matter: he has either lost his pacifier or he is thirsty. This time he had been crying and I came in to find that he had solved his own problem, yay! Philip moved his mattress to the lowest setting, even though he is no where near being able to pull up. When I put him in the sitting position in his crib on the highest setting, his head surpassed the top of the crib rail. He is also rolling around on the floor more to get to toys he desires!