Another theme could be survival. Old bear's stories might tell about how to find food, shelter, and protect oneself in the wild. For example, stories about searching for berries during different seasons or building a den. It gives lessons on adapting to the environment.
Well, there's a story where little bear wants to explore a new part of the forest. Old bear is a bit hesitant because he knows there might be some dangers. But little bear is so eager that old bear decides to go with him. Along the way, old bear points out different plants and animals to little bear, teaching him about the forest. They encounter a small stream that's hard to cross, and old bear uses his strength to help little bear get across. It's a story about adventure and learning.
The main character is the old bear. Regarding its friends, they could be a group of small animals. There might be a little mouse that is very clever, always coming up with smart ideas. There could also be a wise owl that gives good advice to the old bear and its friends. And a friendly hedgehog that curls up when it's scared. All these characters, centered around the old bear, are likely to be the main characters in 'old bear and friends old bear nursery stories'.
Other animals in the bear's habitat could also be main characters. For instance, a sly fox that tries to trick the bear or a helpful deer that shows the bear a new source of water. These characters interact with the bear and add more elements to the stories.
There's no information provided here about the author. It might be an independent writer who created these stories to share some lovely animal - related bedtime stories. Maybe it was a person with a great imagination who wanted to bring the world of an old bear to children at bedtime.
One story could be about little bear learning important life lessons from old bear. For example, old bear might teach little bear how to find the best berries in the forest.