Here are the weather machine and snow park tasks (up to where I have completed)
First tasks. 1 of 8
1) be nice to Osiris (1min)
2) buy a 3-star telephone (1,200)
3) call a friend (3 mins)
4) sell a 3-star phone (120)
5) buy a world globe (10,000)
6) browse the Internet on a computer (4 mins)
7) be nice to Osiris (1 min)
8) bake chocolate pudding (2 hrs)
Second tasks. 1 of 7
1) place a weather machine
2) change the time of day (day or night)
3) Be nice to Osiris (1 min)
4) buy a 3-star fridge(3,000)
5) eat leftovers (1 min)
6) sell a 3-star fridge (300)
7) read the encyclopedia (3 hrs)
Third tasks. 1 of 7
1) make it snow
2) build snow park (it cost me 300,000) located on the west side of town on a new road
3) have a snowball fight (2 hrs)
4) build a fireplace (6 LP) I couldn't find any that didn't use LP
5) nap on a couch (1 hr)
6) make a fancy coffee (3 mins)
7) read celebrity & gossip magazine (3 mins)
Fourth tasks. 1 of 6
1) visit the create-a-sim menu
2) be nice to Osiris (1 min)
3) buy 3-star bed (3,000)
4) catnap in bed (20 mins)
5) sell a3-star bed (300)
6) bake donuts (8 hrs)
Fifth tasks. 1 of 5
1) make it rain
2) get struck by lightening
3) grow beans (9 hrs)
4)
5)
I have not reached 4 and 5 yet.