Rekenreks, also known as arithmetic racks or calculating frames, are ideal for building number sense in students. The Rekenrek gives children a concrete, physical object to help develop and deepen their understanding of numbers. Color coded beads help kids identify numbers without counting. Beads change half way to represent half way to 100, or 50 beads, First 5 rows have 5 red beads, then 5 white beads. Last 5 rows have 5 white beads, then 5 red beads, 10 rows of 10 beads each on sturdy, wooden frame, Measures 13" x 10" x 2-1/2". WHAT'S INCLUDED: Rekenrek counting frame. Imported, Age: 3 years & up, Model no. 79505, 13" H x 10" W x 2.5" D, Wipe clean, Wood, metal, plastic. Gift Givers: This item ships in its original packaging. If intended as a gift, the packaging may reveal the contents. Size: One Size. Color: Multi. Gender: unisex. Material: NONE.