Take a look at the list of the questions we get asked most often. The answer to your question is probably right here.
We can quickly clear up any problems you're having contributing to the Jubilee Time Capsule.
Want to know what happens to your entries into The Jubilee Time Capsule after you click send? Judging, competitions and how your entry might form part of a physical time capsule...it's all here.
Stuck for ideas about what to put in the capsule? Let us give you a few pointers...or we can show you what others have contributed.