Went to Stockholm recently and a word of warning: that money will probably only cover your drinks bill in restaurants. If you don't drink it will go a long way. Enjoy though, it sounds like an awesome trip.
Back in the 90s won a cd Walkman with a Cadbury Caramel chocolate bar. Just opened the wrapper and inside was congratulations phone this number.
When iPods first came out won one by texting a code from a coke bottle. Never usually entered competitions but was bored waiting for train so did it...