Write SQL query to solve given problem: What is the average amount of donations by people who donated in the project "Recording Rockin' Readers". Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT AVG(T3.donation_to_project) FROM essays AS T1 INNER JOIN projects AS T2 ON T1.projectid = T2.projectid INNER JOIN donations AS T3 ON T2.projectid = T3.projectid WHERE T1.title = 'Recording Rockin'' Readers'