I set up centers that correlate to our theme before arrival. After breakfast is circle time then they are off to centers for free play.
I supervise from my desk (like right now) but do not interfere unless there is a safety issue. I purposely look busy (computer, book or writing) so they won't seek my constant praise, assistance or approval (a real problem sometimes with so much learned helplessness and praise for expected behavior).
I want them to think, create and build independently.
They play freely until time to clean up, have snack and go outside. Repeat after nap.