When voiding contracts, minors must return any received items in reasonable condition. This reflects basic fairness principles in contract law.Your interns should be treated like employees whether they are 17 or 18. That means, they should be paid at least minimum wage for the hours they work. First, an applicant's parent or legal guardian must sign the application. Contracts with minors are not automatically unenforceable, they are voidable. Application for Permit for Employment of a Minor in Theatrical and Other Performances. LLC-12 ; Posting: Schedule of Hours of Work for Minors Under Eighteen. It may be filed only in a Pennsylvania magisterial district court and not in the Philadelphia Municipal Court. Failure to perform a minor or important part of a signed agreement amounts to breach of contract.