My child changed the password on her ipad and disabled the ipad how to i reset it?

My daughter 10 year old changed her ipad password without permission and then forgot what she changed it to. She tried to GUESS several times when I wasnt around and disabled her ipad. Is there a way to reset it? I think when this happened before I did a default and set the entire3some how but I cant remember now. Can someone remind me how to do it so I can stop searching ........I am going CRAZZZY looking...... PLEASE HELP ME!!

Thank You!!