EAI Education Jumbo Magnetic QuietShape Foam Dominoes - Set of 28 Fun-to-use manipulatives that will enhance your students' understanding of numbers and facts. The magnetic feature helps to easily engage students in whole class small group or partnership work. Adds color and life to activities involving numbers without adding noisy clatter to your classroom. Includes 28 pieces and an activity booklet. Dominoes measure 2.5"L x 5"W. Recommended Grade(s):K+