There is a demographic chart of one of the company which decorate place by using balloons www.qualatex.com. As you can see in chart that the main part of clients is middle age people then. Also you can see that there is clients of 3-11 age. Which means, adult ordered balloon party for them.
In other chart you can see that main clients has kids with age 0-2.
This shows that my target audience will be children, as same as adults, because both of them loves balloons.
For more information please go there: http://www.quantcast.com/qualatex.com#demographics