Suggest places for the scarves - in front, to the side, above below, between. Tambourines can set the tempo to move around the room. Under the umbrella. Speak very quietly or very slowly. Wheels on the bus is a favorite.
X marks the spot.
Place a number of masking tape X's on the floor. Have the children make shapes on the floor with their yarn and ask them to step inside their shape, walk on their shape, make their shape disappear, etc.