Mini 7 Digits Rods Abacus Soroban Arithmetic Colourful Beads Plastic Kid's Calculating Math Tool

Misright Mini 7 Digits Rods Abacus Soroban Arithmetic with Colorful Beads Plastic Kid's Calculating Math Tool

Yellow Mountain Imports Digit Standard Abacus 10.5 Inches - Professional 17 Column Soroban Calculator (Functional and Educational Learning Tool)

Abacus Mind Math Level 1 Workbook 1 of 2: Excel at Mind Math with Soroban, a Japanese Abacus (Abacus Mind Math - Level - 1 Complete Set: Instruction Book, Workbook 1 of 2, Workbook 2 of 2)