When looking for a puppy, it's good to see that they're friendly, interact well with their littermates, are clean and well taken care of, are old enough to be taken away from their mother.
Puppies are fun to play with, my puppies have always liked playing fetch, playing with Kong toys, playing tug of war with different ropes, and some dogs take to frisbee and tennis balls as well. I like to get them little collars, as well as a Halti to train them on a leash. We give them their own food and water bowls and keep meal times consistent. Bedtime is also something that has to be worked on when they first come home, we choose to crate-train our new puppies and they always seem to really enjoy it.