This is a cube made up of 13 pieces: five yellow cubes, four white prisms and four green prisms. This material demonstrates the power of three with
Power Of Three Cube Nienhuis Montessori
The Power of Three (TV story), Tardis
Power Of 3 Cube – Montessori Materials, Learning Toys and
Power Of Three Cube - Montessori Spirit
The Power of 3 Cube uses cubes and prisms to demonstrate the power of three.The set contains 13 wooden cubes in 3 different colors: 4 in white, 4 in
Montessori Power of 3 Cube - Clearance
Cube Calculator x³
The Cubes Come To Life, The Power of Three
Power of Three Cube Montessori materials
Cubed
Power of 3 Cube
So it turns out they sell the cubes from Power of Three as
Power of 3 cube , Montessori teaching aids, Price: 56.9
BBC One - Doctor Who, Series 7, The Power of Three