Wooden board 12 squares by 18 squares with the numerals 1-18 printed across the top. A wooden box contains 9 red wooden strips and 9 blue wooden strips of varying lengths both printed with the numerals 1 to 9. 

1. To provide experience in addition of numerals. 2. To give the child concrete experience in addition. 3. To aid the child in learning addition tables. 4. Practice in combinations of numbers. 5. Preparation for abstract mathematics. 6. Concentration.