Be prepared... long post...
I did already thought about your suggestions, I guess it could be well executed. The only thing is to know who does organise it, the way we do organise it (solo or together) and at which date the activity will be done. Also, I guess that if it's possible, we should even try to find ideas which aren't even being done on the forum to try it out because it might be a little repetitive then.
Basically, a suggestion of what we could do would be...
Dec 1 - Image & Signature winter-themed (This one we do left it here because I guess it's an awesome idea to get in the holidays.) >I could do it if you're interested, if not discuss about how you would prefer to have it. Then December 2 it would be either you or Brookelas and December 3 the one which haven't been choosen and we are starting the wheel back until the end.
Other things I would be alright from your ideas would be...
-> Riddles (It was REALLY popular when I did it I guess so I'm sure we can do it again and I'm pretty sure that we could do it together for some bonus. Just to remember my activity with Spring Fever, we could do it exactly the same except that I'm not going to be the only one to give out bonus things and we could also modify a few things beforehand.)
-> Minigame (Can be a good idea, a suggestion of mine ~ should be related with winter >Something with snow or ice could also work.)
-> Create an item (sounds good, my suggestion would be this ->Iced-themed to put more difficulty around.)
-> Quiz : Could be good, it's something we can definitely do together.
What I like less
->Board -> I guess it might be a little too long right there, it is usually a failure. Depending of what they have to do we should be careful with the creations. But something like a space or banner "should" be acceptable, however, being myself, I would probably not priorise so, especially if it does take several days.
Also, for the order we are doing. I guess the best would be like I mentionned, I guess we should take an order and rotate unless we have something we are all doing together. I'm not exactly sure at which frequency we would do them, but my suggestions would be either:
1- 3 solo/1 multi
2- Most of it solo/ a few multi (Basically we aren't priorising the activities together, we are just doing a few.)
3- Mixed. (Basically we could do some occasionally towards the event.)
Also, before the beginning I'm pretty sure we'll have to present the activity a day or two before the event. I could prepare a banner for the event that I will show you once it will be done (if I'm getting an positive answer about if you want me to do it) and the introduction topic if you are both interested. If not, then tell me who should do it.
Once I see some of your opinions, I will continue to discuss forward. I am trying to bring some ideas for the activities and when I will have got some, I will present them. Also, we still have to wait for Brookelas' answer because he haven't give it yet and we are already in a few days of presenting the event.