Magnetic Time Activity Set Build a giant demo clock on your whiteboard so the whole class can see! Durable plastic clock hands are geared to move in accurate increments for hands-on reinforcement. Simply remove any magnetic foam number to assess. Then write in a number word or Roman numeral to differentiate. Minute hand measures 2 1/2"L x 11"H; numbers approximately 3" in diameter. Grades K+ LER 2984