The snow globe is actually called a snow hut.
The Christmas tree is actually called a New Year Tree.
Everything happens on the Island of the Ancients.
To do the quest that requires neighbours' help you do need various commodities.
The quest is called the Dino Snowman quest (I think).
When someone initiates the quest, you need to achieve 100 point within the 24 hours from start.
The things needed to get the points are:
Shovels worth 1 point within the quest. Get these from the patches (drop frequently from 3 minute watermelons).
Mittens worth 2 points drop sometimes from nice huts.
New Sculpting Tools worth 3 points drop from Houses.
Snowballer worth 4 points drops from Cave.
Bucket worth 5 points drops from Airplane.
(The last 2 are from memory and I may have them mixed ie bucket might be from cave).
The Snowballer and Bucket are the hardest to find, not least because each search takes 1 hour and there's only one cave and one airplane. They then drop very rarely.
The only possible way to achieve the 100 points on your own is if you have 20 buckets because each individual player only has 20 actions in the quest. 20 x 5 would give the 100 points needed.
I don't think that 20 buckets is possible as I only got one after searching all day.
I believe that the reward is snowballs and these are used to buy gifts in the store. I think that gifts contribute somehow to the completion of the New Year Tree.
It seems rather complex and difficult, but these quests are often achievable once you properly understand what you are doing!!!
In the meantime, look out for the buckets, snowballers, and new sculpting tools etc. Try to gather as many as possible. Check the blue Dino tag within your inventory to see how many you have.
Once there are a few of us with sufficient progress and commodities we can try to start a joint quest search. You will know that you're ready to start when you click on the Dino symbol in the top right of your screen and it indicates that you can begin the quest. I think this happens when you have the snow hut and the new year tree in place.
If anyone knows more then please advise.
Nutty