Knut, the Polar Bear Cub Update

Polar bear cub Knut continues to be the most popular attraction at Berlin's Zoo.

Hundreds of visitors lined up on Easter Monday to catch a glimpse of him.

 Zoo directors say the 4 month old cub has become so attached to his keeper, Thomas Rflien, that the keeper had to cut his break short when the cub started pining for him.

Knut receives about 200 fan letters a day.

And German toy companies have already come out with a Knut stuffed bear.

The cub got international attention when animal rights activists said he should be put to death since his mother abandoned him.

They say that's what nature intended.