Learn through play with the bright、 vibrant in colour Learning Resources View-Thru Colourful Geometric Shapes  The transparent 3-D plastic shapes provide a hands on learning experience on geometry、 volume and other measurement concepts  The removable bases allow for relating 2-D shapes to 3-D solids  Easy to fill with liquid or dry fill and easy to clean  An activity guide is included for additional information  The View-Thru Colourful Geometric Shapes are part of a wider range of maths products by Learning Resources  Learning Resources have had more than 25 years experience in creating award-winning educational toys and games  Their products are used both in the home and in schools and are a recognised and trusted brand by parents and teachers alike