broad Stairs/Brown stairs/Montessori activity/Sensorial area/Lady bird/ manjeri 

It is a set of ten browns blocks, square prisms, that range in size from (20cm x 1cm) to (20cm x 10cm), increasing by width and height.
The Brown Stair is a grading activity that helps visual acuity and the concept of sequence in preparation for future activities, such as reading, writing, and math
Lady Bird
International Montessori
Teacher Training Institute
Manjeri-9745071514,9207200999