I can't thank you guys enough. I'll look up the evaluation website. After looking at the posts yesterday I talked to my husband about his loss of words. My ds' take on it is that the words he lost were some early words that perhaps he didn't learn at all, but was just mimicking. He also said that some words I thought were lost weren't. Apparently he said "cow" as plain as day to my dh a few days ago when playing with a cow puzzle. He doen't have a large spoken word vocabulary. He does have a large vocabulary for his age, but not what I would expect to be gifted. He just turned 18 months and speaks around 40 words regularly. He is adding new spoken words daily. He understands almost everything we say. We had to start spelling when speaking about certain things around him at 12 mo. Am I exhausted? Yes. I have him involved in several activites a week outside the house, yet it doesn't seem like enough. He masters and gets bored with his toys quickly.