they can be great activities for kids. (And adults, of course!) These math puzzles test your brain and critical-thinking ...
Ages 2-8; Google Play Store & iOS FREE From the educators at Khan Academy comes this app geared at elementary school-aged kids. While not limited ... and mysterious puzzles for your kid to decrypt.
Martin Gardner’s Mathematical Games column in Scientific American fascinated and mystified readers for decades—and his legacy ...
The Elements by Theodore Gray iOS Animated by detailed, high-quality 3D graphics, The Elements by Theodore Gray brings the ...