Party Palnners, Help!!!

Help!! I am in desperate need of advise. I am starting my buisness as a party Coordinator and I need to know: How do you protect yourself from getting sued? What if a child falls off a bouncey castle? what if an animal from a petting zoo bites someone? What if the entertainment doesn`t show up? Being that I am not providing anything, I am only coordinating through other insured companys, what do I need to protect myself? Please help, my start date has been delayed for 3 weeks, due to lack of information. Anything you could do to help me, please mention it. Thank you, I am so desperate!