<div dir="ltr">Hi<div>I used this last year and it worked well, maybe an activity for this year</div><div><br></div><div><a href="http://www.gcsecomputing.org.uk/support/network/NWB_SIM.swf">http://www.gcsecomputing.org.uk/support/network/NWB_SIM.swf</a><br></div></div>