+~ü@>šHHÛ@ÿçÿîÿR#(ü,, ç `,- ^ì&'dAxxxx€Là‚ h` ÿ ÿInstructor needs:  bucket of sand ( 3" x 3" x 3" Inside diameter open cube.  $55 per cube€Làn h  %Activity: Pour a model concrete slab. AEquipment: Yard stick, one foot ruler, tag board or construction paper, masking tape.€LÔ`  ÿ ÿ