Just came across this. Thanks to @maryannreilly for this post
"I so appreciate the thinking that informs Imagination Playground:
Provide kids with open space and portable blocks and observe how they
make their own play space and what gets enacted and invented within that
made space. If I had a school, I'd invest in this type of product along
with lots and lots of blocks, sand, water, paints, musical instruments
(especially different types of drums and sticks), and other stuff
children can find and use to make things.- Mary Ann Reilly"