How can i aquire direct mailing list for my target demographics?

Income: $75,000+ per year
Age: 25-45
Geographic location: South New Jersey

The best site I've found for finding information like this is www.melissadata.com/Lookups/ It will cost you some, but a very accurate list, from what I've heard. A good place to start, at least.

I think all the above are good suggestions butt do not rule out your local lumberyard. They might display the product you made with purchases made there?

Don’t just limit yourself to one vendor of any necessary items either. Make sure you have back up suppliers for everything.

Are you making these play toys with plastic? Lumber? etc.... what kind of suppliers do you need? Tools?

Good Luck and let me know when you have product to sell I have 10 kids and some of them are starting to give me grand kids, I might be able to throw some work your way, I currently want to buy some kind of a back yard playground for my two youngest who are 2+ and 4+ years old.