The Miquon Math materials http://miquonmath.com/ http://miquonmath.com/ have a playful spirit of exploration and go well with the Cuisennaire rods already rec

The Miquon Math materials http://miquonmath.com/ http://miquonmath.com/ have a playful spirit of exploration and go well with the Cuisennaire rods already recommended by DanBC, a recommendation I heartily agree with. My children all began their initial math instruction with the Miquon Math materials, and my oldest son, grown up and working as a hacker, definitely benefited from playing around with mathematics a lot as he grew up.