Sort the shapes or order them from smallest to largest.
Put each shape in the right basket: a circle with the circles, a square with the squares, even if they have a different colour or size.
A hands-on workshop for the last year of kindergarten around simple shapes (circle, square, triangle, rectangle) and sizes. Two modes: sort shapes into the right basket regardless of colour and size (the sorting attribute is the shape); seriate objects from smallest to largest. No score, no timer — observe, manipulate, order.
In the last year of kindergarten, used autonomously on a tablet or at the maths corner, alongside logic blocks (Dienes), sensory material (Montessori) and sorting trays in the classroom. The teacher selects between sorting and seriation.