Boy kitten (7.5 months) has a real thing for pencils, he steals them and runs off with them, and spends ages rolling and flicking them about, it is his greatest joy.
Girl kitten (5 months) likes DD's troll toys, she nabs them by the hair and runs off with them, she also has a thing for the puppies from older DD's puppy suprise toy, she steals them and runs under my bed with them where no one can reach.