Plaster, news papers, chicken wire net, wire | 石膏粉、報紙、鐵絲網、鐵線155 x 98 x 54 cm | 厘米When one side move forward, the other side need to move backward.When both attempts to go forward, it stuck.當其中一邊向前走時,另一邊需後退當兩邊都向前走時,就卡住了