Here are some circles which are coins, counters, and rings. I used 10 coins, 19 counters, and 12 rings.
I wonder how many coins, counters, and rings I would need to make the next size up for each?
What is your idea of the 'next size up'?
My shapes are a triangle, a hexagon, and a rectangle.
What shapes could you make by putting circles together?
How many would you use?
How many would you need for the next size up?