Multi-Storey Renovations Quest (Part 1)

You will get 5 days and 23 hours.

First, you need to build the Community Center (in the upper left corner of the map) which will set you back $200,000 and 44 hours, send a Sim there once it is complete, talk to the bunny for 5 minutes, go upstairs by 'clicking' on the arrows option to the right of the screen (it will 'flash') then do some woodworking for 9 hours. My Sim made a Wooden Doll that it had to catch. And finally go back and talk to the bunny out front for 16.5 hours.

An Alien Concept: Weather Machines (Conclusion)

Have two Sims WooHoo (they have to be married or partners), be rude to the alien and then celebrate by listening to Electronica Music on a stereo. (I may have forgotten something and the order may be a little off)

Yay!

THE END

It's [not] All Going Swimmingly (Part 3)

I am not going to be able to finish this Quest within the time limit.
DO NOT WASTE YOUR LPs on this Quest!!

You will now need to sit in the Lifeguard's chair (I forget how long - I think 12 hours), get all the medals in the level one Swimming Hobby (easy if you have 4 Sims all diving at the same time), then you need to stare at the water slide for some 16.5 hours, next, you need to Run Fake Errands for 22.5 hours! 
After all that you will need to pet a stray cat (it will have an exclamation point on it) for 3 hours and then spend 16 hours giving it directions.
This should get you to the 68% mark.
Now, you need to spend 3.5 hours using the water slide.

I keep receiving an error as I'm trying to use the water slide: 'One or more of your Sims were unable to continue their actions when the weather changed'.

I have gone from 31 to 2 LPs on this Challenge. I was hoping that maybe some of the tasks would be long and the rest short, this does not appear to be the case. Every task is long and you should just resign yourself to the fact that you will not finish this task within the time limit, if you did not have the money to build the Swim Center right off the bat.

Toddler Quest Conclusion

Once you talk with the Statue you need to celebrate by listening to the stereo.

That's it!

Mysterious Island (Part 2)

After making the Croissants (you should now be at 90%), you are now ready to build your bridge.

It requires $20,000 (ouch!), 30 hours and a minimum of 8 Sims.

Keep in mind that you cannot build two things at once and once you start construction you cannot stop or pause it.