This time I do experiment using about 25000 matchsticks chain reaction to powered the cardboard UFO. It can take off more than 15 meters high. It is so fun and ... source
READ MORE +Cardboard
This time I do experiment using about 25000 matchsticks chain reaction to powered the cardboard UFO. It can take off more than 15 meters high. It is so fun and ... source
READ MORE +
