Dragoncrest Cliffs and build a lego house.

Artaax felt his teeth connect to buttocks, and he growled in triumph in that moment. Locking his jaws tightly on said buttocks, he jerked his head to try and knock his brother off balance. Bobby responded by twisting to face him and barking  loud in his ears. Artaax shot him a glare out of the corner of his eye and flinched away, but didn't release his hold. He'd had a great deal of practice at not letting go of anything ever with his games of tug of war with whoever would play with him, so he was prepared for this. Instead of relinquishing his hold, he thrust himself forward into Bobby's flank, again attempting to knock him over.

Bobby fell, but that was far from the end of the fight. They tussled for a while until in their exhaustion, it was forgotten what they were fighting about. By the end of it, they were panting and laughing, and Blixen was no where to be found. Tired as they were, they still raced each other back to the den, shouting lame insults and challenging words at each other all the way like the competitive young brothers they were.