Montessori educational material:
Complete set of wooden number representations on a tray.
Familiarize the child with the names of the decimal categories (units, tens, hundreds and thousands) and with their relative proportions.
Contents
Wooden cube of 1000: 1*1000,
Wooden squares of 100: 9*100
Wooden bars of 10: 9*10
Wooden units: 9.
Perceptually, it introduces exponents in the form of dimensions, showing that units are points, tens are lines, hundreds are squares and thousands are cubes; by providing only one thousand, it suggests that the set of a point, a line, a square and a cube completes one full cycle of the decimal hierarchy, the cube being the "point" of the next higher cycle of the hierarchy.