The Fickle Mind of a Toddler

I am constantly amazed by the fickle mind of my 3 year-old. We put him in the tub tonight for a bath and all he did was cry and scream that he wanted out. The minute his bath was finished and all the water was drained he screamed that he wanted to take a bath. What to do with a child who cannot make up his mind? I guess we can do nothing but just laugh in hindsight and wonder what we must have been like at that age...