The makers of ZhuZhu pets have come up with a new toy line that is also based on a simple, yet catchy idea: Collect the rubber-coated ball bearings, each with a different design and weight, and race them on a track. Jim Silver, editor in chief of TimetoPlayMag.com, calls it "marbles meets racing." Individual DaGeDars retail for less than $5, but of course there is a large collection of add-ons that are sold separately, like spinners, cannons and carrying cases.