Excitement
From my step-mom, Kristine:
Last Thursday Nick (my son who is 6) was working on a birthday card for Hazel (my daughter who is 1, turning 2). Having written out the greeting unaided, he showed it to me to check on the spelling. I told him it was perfect and asked him if he wanted to add some punctuation.
"What's punctuation?" he asked. I told him it was like commas and periods.
"Oh yes!" he exclaimed, "I'm going to add an excitement mark."
Says, Kristine: I think "excitement mark" will forever supplant the term "exclamation point" in my mind.