Here are links to a Danish collection of BDM and HJ postcards, stamp cancellations and paper "stuff for nazi children"
http://www.moonwheel.net/BdM/index.htm
http://www.moonwheel.net/HJ2/index.htm
http://www.moonwheel.eu/HJ-Cancels/index.htm
http://www.moonwheel.net/Kids/index.htm
.
http://www.moonwheel.net/BdM/index.htm
http://www.moonwheel.net/HJ2/index.htm
http://www.moonwheel.eu/HJ-Cancels/index.htm
http://www.moonwheel.net/Kids/index.htm
.