This material is used to introduce the concept of negative numbers. 

The material consists of a presentation tray containing six boxes of bead material, one box containing 5 sets of coloured bead stairs, one box containing 5 sets of negative bead stairs, one box containing 1 black and white bead stair, one box containing 1 pink and white bead stair, one box containing 25 golden ten bars and one box containing 25 grey ten bars.

This is an educational material and it is recommended that it only to be used under the supervision of an adult familiar with the Montessori method of teaching and learning.

Developmentally appropriate for ages 7 years +

Beads are made of Nylon.

Boxes are made of Beechwood.

SKU: C202

Please note that this is a budget version.  Click here for our collection of AMI-certified Montessori Math Materials.