Animals do not need "fun" the same way humans do. Tying human emotion to an animal is not reasonable. Animals may enjoy something they are doing, but that is the extent of that issue. They do enjoying hunting, killing and eating prey. They are one of the only animals that will go out of their way to hunt and kill humans. That appears to be fun for them.
Usually at the age of 4
No, polar bears have lungs just like humans and other mammals. Polar bears can hold their breath for several minutes at a time, but they have to come up to breath frequently.
Polar Bears live an average of 15-18 yrs.
Yes, and polar bears LOVE the snow. When the snow comes down, it's time for the bears to come out and play--or hunt, rather, because it means that the sea ice is soon to close in to allow them to roam and do the things polar bears love most.
Polar bears eat seals, and seals are found in the sea.
Winter
A little at a time.
Polar bears do not have a routine like humans do. What a polar bear does in a day is never the same. There are numerous days where a polar bear is just travelling, not eating, or waiting out a snow storm. It all depends on the bear and the time of year, among many other things.
No. They prefer to be alone most of the time.
sticks his ding dong in his teddy bears mouths
The collective noun for polar bears is a "celebration." So, next time you see a group of those fluffy white giants, you can say, "Look at that celebration of polar bears!" Just don't expect them to break out into a conga line or anything.
Polar bears can give birth from one to four cubs at a time, but apparently two is most common.