It's a...

Now go back and watch Mako :)

If you thought it was a boy, you are not alone!  Just about everyone who guessed said boy, but it's a girl!

I thought the dark purple balloon would be perfect, but you could see the color through it.  We covered it with a bag until just before we popped it.  Also, it would have been a lot easier to fill it with much smaller confetti (but I'm guessing a lot harder to clean up!)