ETA hand2mind 100-Bead Wood Teacher Demonstration Rekenrek, Math Counting Frame (Ages 4+) Help children develop number concepts and learn basic facts up to ten with this demonstration rekenrek model Perfect for teaching & demonstrating addition, subtraction, and number relationships Includes wood rekenrek frame with 10 rows of 10 beads (5 red and 5 white) Math manipulative for ages 4 and up, grades K-2 Includes one wood demonstration frame that measures 20 1/2" x 15 3/4" x 5"