Sweet baby Flash isn’t such a baby anymore. At 18 months old, we’ve got a toddler in the house again, and this little boy lives up to his nickname. Turn your head for a second, and he’s gone, scaling furniture, digging through cabinets, and getting into mischief. He knows what he wants, and he goes after it. When he’s not getting what he wants, he’s quite vocal. I do believe he’s the most opinionated and expressive of the Robertson children. Heaven help us.  Aside from the yelling at me portion, I do love this phase. I love that Flash recognizes me as the one who meets his needs. I’m the…