In Sweden the number 6 is spelled "sex" and I've spent a few conventions with Norwegians giggling about it while disappointed Swedes looked on.
Edit: Damn, I was sure I had checked all the ways the Nordics spell 6 but apparently I missed Iceland. Oh well, maybe he was just optimistic and hoped it was about actual sex.
@MissStory it's a reference to the number six in Finnish. In Finnish six= Kuusi means, six, spruce, fir, six o'clock and your moon. And since Swedish is the second language of Finland and Finland speaks Swedish he translated it as bring spruce toys.
@emptyribcage It's a grammatical rule in Swedish. While särskrivning is what it's called when you don't follow the rules, it's more famous due to the people making fun of it.
Example: Sex leksaker becomes six toys
Sexleksaker becomes sex toys.
@Fluffkin in Finnish 6=kuusi. Also means spruce/fir. So it fits in with the double meaning of 6. Plus Finland might like SM-play with Sister Sweden anyway.
@Hinoron Not spruce swithces but birch branches tied together. And it's not a myth either, we whack each other with those at sauna all the time. It's very enjoyable as it' gets the blood running without really hurting at all (since the branches are soaked in water and the heat/sweat smoothens the skin). I've even heard that some people use sting nettles instead of birch branches, and it was explained in a way that makes sense to me (the nettles, just like the branches would be soaked in water, and with the heat and sweat smoothed skin, the stings wouldn't actually pierce it, but would still release the histamine, which would cause a mild burning sensation). Still haven't been brave enough to try the nettles myself though.
Ok, since everyone is so interested on Finland's birch branch...
It's for whipping, in the olden days it was often used to punish naughty children. SO in this comic's context, it will be used for some naughty BDSM play ;D
For the sake of the joke, we're all going to ignore how odd it is to write an invitation that says: "Come to my party and bring 6 toys."
...Which six? Any six? Why six specifically?
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