Locked IPAD

I have an older IPAD that was given to me by a family member. That member delete all information from the IPAD and deleted her password and email address. She looked in her account to see if her information was still there. She gave the IPAD to us and my grandson started hitting buttons which caused it to lock Now I'm needing to unlock it and cant. I have followed the directions on your webpage but nothing seems to work. Can you help or do I need to consider this a loss and throw it away.