The Philip Harris formula model gives students a simple hands on model to explore chemical bonding. Understanding that the vast range of different substances are combinations of relatively few elements is a corner stone of Chemistry. This kit uses a simple 'jigsaw' analogue, to show which combinations of elements work, and which don't, giving a dynamic, visual and tactile method to learning.

It comprises of magnetic pieces which represent different elements and functional groups and allows the construction of simple ionic compounds. The visual nature of the pieces make it easy for students to work out the ratios required to achieve a neutral compound.