Their favourite toy of all time so far has been a phone book. They'll spend hours ripping it apart. Typical - you could get them the nicest toys in the world and they'd be more interested in the box it came in! So I don't really bother with buying much, they have a chewwy/hidey tube, a wooden block garland, hard plastic balls, thick rope balls, those carrot/sweetcorn toys covered in paper with dried treats inside, a hard plastic mini dumbbell because OH thought it would be hilarious to put it on Jessie's head :roll:
Other than that I give them loo roll tubes, cardboard boxes, phonebooks. Anything they can ruin, really.