Inspire kids to use critical thinking skills to create their own unique marble runs with long, short, and curved magnetic pieces! Drop a marble to see each design come to life. Engineering and problem solving have never been this much fun! Kids can rearrange the pieces countless ways to make the marble change speed and directions. Learning Skill: Science Recommended Ages: 5 Years And Up Measurements: 12.75 Width/Inches, 12.75 Length/Inches, 2.75 Height/Inches Assembly: Assembled Base Material: 100% Plastic Country of Origin: Imported p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 15.0px Calibri; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} WARNING: CHOKING HAZARD – small parts. Not for children under 3 years.