Prepare materials: Pen,rule,paper,scissor,tape,Transparent folder(CD box)
Step 1: Draw an isosceles trapezoid on the paper, 1 cm above the bottom, 3.5 cm high, 6 cm lower, then cut down with scissors
Step 2:Place the transparent folder on the isosceles trapezoidal template, cut it with scissors, and cut 4 pieces.
Step 3:Tape the folder along the trapezoid to be glued together, sticking like a tower shape
Step 4:Find a holographic video on the Internet, put the finished “projector ”in the middle of the phone, turn off the light, you can play it.
