My DS get far too excited about stuff - until he is nearly frothing at the mouth. He doesn't seem to be able to control his excite and he works himself up to fever pitch until he is nearly hyperventilating. We have just been on holiday to my BIL/SIL in Switz and they live nr a lake and my BIL regularly took my DD(7) and DS out on the lake in a dingy. My DS scared the life out of me as he was squealing like a donkey and I had to put my hand over his mouth in the end as he couldn't control himself. His chest was going up and down and he was making the most horrific noises all because he wanted to go in the dinghy!!! It's lovely that he obviously enjoying himself - but his excitement levels are way beyond any levels of excitement I ever see in other children.