Over the last couple of days the boys have collected a lot of pine cones from our backyard...about 50. Today the boys were playing with sidewalk chalk, my eyes fell on the wheelbarrow full of pine cones, and....voila! A very large version of numbers and counters:
Kal-El liked to use his dump truck to transfer the pine cones from the wheelbarrow to the work site.
I think I will refresh the numbers as needed and hopefully they will revisit this work again as the summer continues.