Sturdy Numarkasten! This "see, touch, and understand" educational material is perfect for Montessori and STEAM learning to eliminate stumbling blocks in arithmetic. My children (2 and 4 years old) actually use this! ■ Features of this product ・Sturdy wooden case (the dividers are made of resin) ■ Contents ・Numarkas main body [wood] ・10 balls [blue marbles] +10 additional balls for 200 yen. If purchased separately, it will be 400 yen. Please comment before purchasing. Size (approx.) Width 15cm, Height 10cm, Depth 3cm Numarkas Early childhood education Educational toys Nature Science Please refrain from purchasing if you are concerned about the details, as this is a amateur sale. We offer discounts for multiple purchases and repeat customers, so please comment. Popular keywords... Shichida method Type... Numbers