You don't need to buy kiddie chairs and tables for the kids to use at the party. Especially if you plan to invite many kids and would have no use for all these chairs and tables afterward. What you can do instead is rent them. There are party supply stores that are offering chairs and tables for rent. Some rent out tents, too, if you are planning on an outdoor party. You can do a quick online search for furniture rental in your area. Some rental companies also offer kiddie table sets, where one table already comes with six or so chairs. You may also want to get a couple of extra sets as a craft table or for certain activities like cookie decorating. And oh, when hosting a kiddie party, you would also need tables and chairs for grownups. Your little guests will be coming with their parents, so you would also need something for their adult companions to sit on.