We have created a textbook using book module and embedded custom blocks in page content
with custom form for fulfilling tasks on the pages.
Users need to color images on the book content page .
The images are predefined [login to view URL] images are attached with this mail.
After the completion of the coloring task the colored image for every user need to be saved in
database along with info like user id,node id and image for future reference purpose.
We have more than 10 years of experience in Drupal. We have a good team of Drupal developers and frontend designers. We can deliver the project as per your requirement.