Former first lady Barbara Bush is promoting literacy on her 90th birthday.
Bush is lending her backing to a USD 7 million challenge by X Prize and Dollar General. They're challenging developers to create a mobile app to help improve adult literacy skills.
The original X Prize was awarded 11 years ago for privately funded, suborbital flight. Since then, there have been other X Prize competitions aimed at spurring innovation.
Bush family members including her son, former Florida Governor Jeb Bush, who is expected to announce his presidential run next week are in Kennebunkport for her birthday on Monday.
A gala is planned for Monday night and a tent has been erected on the grounds of St Ann's Church.
