Welcome to YT! If you've only had him for 3 days, he could still be adjusting to you & his new surroundings, he may warm up to all the toys still.
Get him an Everlasting Treat Ball - that will definitely keep in busy. My Bubba doesn't care about toys, but he loves this!
Once this little guy has a name, be sure to sign him up for our Little Gentleman's Club, you can do so on this thread:
http://www.yorkietalk.com/forums/sho...ight=gentleman