You may not think of polar bears as a summertime animal, and it's true that these Arctic creatures must adapt as the weather warms and their habitat dramatically retreats. But for one little polar bear, the sun's rays mean a new world to explore as the ice melts away from his home in the Scandinavian Wildlife Park. It's been awhile since we checked in on Siku the orphaned cub, but it appears he's been keeping himself busy over the last few months and growing bigger (but staying cute!) along the way. Here's a roundup of our favorite Siku photos to get your weekend off to a great start!