Coloured Stacking Stones - Set of 9A Vibrant Invitation to Balance and Create. Add a splash of colour and creativity to your learning environment with the QToys Coloured Stacking Stones. Beautifully crafted from sustainable rubber wood and finished with non toxic, child safe dyes, these stacking stones provide a vibrant and tactile experience that supports open ended play across developmental domains. Uniquely shaped and coloured, the stones are ideal for stacking, sorting and