Reception age children, measuring would be bigger than/ smaller than type stuff I would imagine? Why not try to get him/her to sort shapes by type and then arrange in size order? eg have different size squares/ triangles/ circles, etc then arrange in size. 3D shapes such as spheres and cubes you could get marbles/ balls/ dice/ cardboard boxes, etc. they could sort onto a piece of card with the name and a picture of the shape to help recognition.
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