Hidden Easter Egg colouring challenge

You have heard of google Easter Eggs, well here is one for the classroom.
This resource is based on the idea that there is something hidden for the pupils to find within the puzzle itself.
There are 24 questions that need answering and then on the grid the answers are coloured according to the question number. This will reveal an easter egg hiding the number 1939 ( a worked solution included)
The challenge then becomes what questions can the pupils come up with that are uniquely interesting. (we came up with when was the wizard of Oz released which itself has some easter eggs, gone with wind was released, what time is 21 minutes before 8pm in 24 hour clock), the pupils are only limited by their imagination.