You can breed frogs when they're in your inventory and get a new specie.
I'm still playing around to see how many different species you can get.
You can only breed one pair of frogs once a Sim day, and only when they're in your Sims inventory.
Screenshots can be saved as memories.
Open up your camera control panel in the upper right corner, click on the small icon saying screenshots. The new window will open up with your active Sims memories, in the lower left corner switch to screenshots.
Pick a screenshot and save it as a memory. Go back to your Sims memory and in the upper left corner there's a drop down box , click and choose what emotion you will save the memory as. In the same window you are now able to choose to reminisce about that memory. When doing so , it will be added to your sims que. When your Sim is done reminiscing about that memory , it will give a mood boost to what ever mood you've saved that memory as.
For instance : Saving a memory as a happy memory gives a +1 happy mood boost for 4 hours.
I hope I remembered everything right, but will double check later.
Still need to try out the other mood memories.