My husband's little sister's first word was "Hub" -- which apparently was her word for him (his name is Iain, so go figure...) 2nd word was "Mama". 3rd word was "gogok" (meaning chocolate). 4th word was "Dada"... priorities, dontchano!
I knew a kid like your neice, MMario -- not her first words, cos she must have been 5 or 6 but anyway, I was babysitting; she wanted to "play catch". She showed me where to stand (a few feet from the rungs to climb up something), climbed up the rungs while I looked on, bemused, then suddenly launched herself in my general direction! I was lucky to catch her...