Orders are taken instead. The booth prices are generally high but the amount of exposure you'll receive is often worth it. Then you are probably familiar with fund raisers. Make up a small 4-6 page catalog featuring all of your crafts. Be sure your prices are high enough to make you a profit and get Jenny that new cheerleader uniform.
Children are great marketers.
Give the school an alternative to candy and stationary. The children's customers would probably appreciate the change as well. Approach the big boys. Only approach larger companies if you are able to mass produce your craft. There are all types of companies that look for new products that can be mass produced.