A casting calls for a child involves the parent heavily, so for your child to have a good audition, there are things you as a parent must do well.
The first rule when having your child audition for roles and dive into the world of acting is to be honest with your child. Tell them that no part is guaranteed, and they may go on hundreds of auditions before they get their first part. If they know exactly what to expect, they will decide very easily whether performing is for them. After all, it is and should always be their decision. Never pressure your child to audition. Be supportive and as interested as they are. Auditions for children aren’t for every child, even if you as a parent think your child is the cutest, most talented kid in the world.
During an audition, the cardinal rules apply just as in a regular, adult audition. Arrive fifteen minutes early and come prepared and rehearsed. Though your child is playing a part, let them be themselves. Casting directors like kids who act like kids. It is your child’s choice to have you accompany them into the audition. You as a parent will not be able to sit in the audition. No added pressure from parents has ever increased a child’s chance of getting a role, and casting directors feel a parent’s presence will affect their performance.
Be respectful and tell your child they did great afterwards. Constant support is necessary when the rejection rate of auditions for children is so great. Once you have finished your audition, wait two minutes before you leave in case the casting director wants you to come back in and read again. After two minutes, sign out, thank the casting assistant and leave quietly.
Hopefully your child will land a role and you will continue to be a supportive parent. If your child is sincerely into acting and wants to pursue it as a career, enroll them in local theatre companies and expose them to arts around your area as well as find other auditions for children that you and your child both think would be fun roles to do. Good luck!