Tập 1 : https://scratch.mit.edu/projects/1157666443/ Tập 2 : https://scratch.mit.edu/projects/1157877077/ Tập 4 : https://scratch.mit.edu/projects/1158403768/ Tập 5 : https://scratch.mit.edu/projects/1160931759/ T6: https://scratch.mit.edu/projects/1199965186
