I agree, your demographic is much bigger than you think. I would buy retro stickers, I loved those when I was a kid. As for the site, cute but it focuses a lot on the story and not enough on buying them. It would be fun to have a character sniff at the very beginning and say something like, "I smell strawberries" and another saying something else, etc. and maybe pulling stickers out of the grass... just a thought, something that illustrates what the product is a bit more.

You could also put an icon or graphic under that text on the left that says "Store" or "Buy your Scratch & Sniff Stickers HERE!"

Another little thing I noticed is that I keep thinking the fairy is having bladder problems because of the placement of the stars dropping out of it. I see it out of the corner of my eye and it bugs me.

Actually, I would take that green text under Welcome to SmellStickers.com and put it on one line above the square with the animation and change it to another colour, maybe a dark pink or magenta. Sorry if this is too long, part of my job is analyzing sites for creative and layout.