How to reset/remove my info from an old 3rd gen iPad before gifting to daughter?

I have an old iPad 3rd gen (A1403), have not used for long time. Can't even update my ios 9.3.5 to 9.3.6 as wheel keeps spinning. Want to give to daughter to use, especially for Wi-Fi use. We also both have our own iPhones. How do I reset/remove my info from it before giving to her?