We operate free afterschool programs and are moving into a new location with large open rooms. The space will be great, but the rooms are nowhere near soundproof -- loaded with with echoes! Does anyone have tips on cheap ways to reduce the noisiness and echoes that are bound to come with filling the room with dozens of children? Curtains (what type)? Rugs (what type)? Plants? Room Dividers? Other Designs? Cheap Noise Reduction products (that work)?