Thanks Bath...I think you may have hit the nail on the head! Jack is a very active (probably over-active) baby. He is doing things that just amaze me, things that his 8 month old cousin isn't even attempting to do yet....I think his brain is just miles ahead of his body, he gets frustrated easily ...and now that I think about it, the extra stimulation of having his brother, sisters and their friends around all school holidays has probably sent him a little bonkers...you can actually tell he wants to be up and running around with them, LOL. School goes back tomorrow, maybe he will start to sleep a bit better soon.