Strewing is exactly what it sounds like - sowing or scattering things to spark the interest of our children. There are a few more particulars about the hows and whys to strewing, but the idea is simple enough to comprehend.
The Art of Strewing (A low-key way to encourage kids creativity & learning)
What a cool idea - The Art of Strewing: Strewing is the art of casually yet strategically leaving “invitations” for learning and creativity out for your kids to discover on their own. (from The Artful Parent)