Terrific for teaching children to count. Dry erase, magnetic number line features a yellow background that stands out on whiteboards. Color-coded odd and even numbers for easy recognition. Comes with 26 strips of numbers, with 5 numbers per strip, that measure 10" long by 2-3/4" high. Also includes 2 blank strips, a 0 piece and 2 arrows. 31 magnets in all.