Torontokids you may be onto something!
He is the only one out of my crew - 4 toddlers ages 18month to 2ish including my own 23 month old who has not aknowledged my pregnancy at all! All the others, boys and girls, are all over my belly "baby baby" carrying around the baby dolls, etc. He hasn't made any reference to it at all and hes' the oldest one here.
Hmmm he may be sensing that babys arrival is fast approaching. He also has NOT done well whenever I have had a newbie start since he's been with me the longest.