I am a KS1/2 trained NQT but have started just started my first post in a Reception class (love it!). I am teaching 2D shape and am starting the week by discussing the shapes and their properties (in child speak of course). As we are looking at firefighters this week as a focused activity I was going to get the children to paint fire engines used shaped sponges, encouraging them to talk their activity through. However I am fully aware that although their picture will be an array of 2D shapes they will actually be using 3D shapes to paint. Is this a bad idea? Will it confused them?