Evidence of fun
Today I will save my explanations about why "fun" is good for children and assume that we're all in agreement that children's receptivity to learning is heightened during play.
I enjoy finding "evidence" of children's fun.
Probable unrestricted use of paint
Child-initiated clean up station
Sand splatters (e.g. from overflowing food)
Kids using containers meant for adult use
Sand toys being used as stylish apparel
Have a fun week!