The Yellow Door Natural Focus Frames are a set of three wooden frames which nest inside each other. They can be used as a frame for transient art projects using materials collected during outdoor activities. They are also great for focussing attention on an area for close inspection such as bug counts. Set contains 3 sizes internal dimensions:1 x 205 x 135mm 1 x 150 x 80mm1 x 95 x 20mmThe Yellow Door Natural Focus Frames:Helps children to make sense of their physical worldDevelops creative and critical thinking skillsComplements a natural environmentMade from sustainably-sourced beech wood. Age Suitability: 18 months +