The steps are as follows:
1, fold the square paper in half, leaving creases and unfolding.
2. Fold the left and right sides toward the middle crease, and fold the top and bottom toward the middle crease.
3. Unfold the colored paper, retract the four corners, and unfold after leaving creases.
4. Harvest a square one by one along the creases of the four corners, and prepare four identical squares.
5. Put one square piece of paper on top of the other, and separate the angles. Then fold the lower four corners up first, and then fold the upper four corners up. Take the top off. Stick double-sided adhesive on the inner corner of a square paper, tear it, press the other one back and recycle the corner.
6. Fold the other two square pieces of paper in half according to the center below. Fold it in half, spread it and flatten it.
7. After folding, turn to the back, separate the two pieces of paper, fold them up and paste them. Press the triangle of four square products to both sides to form a protruding small round square.
8. Prepare a square piece of paper with the same size, fold it in half and cut it into two rectangles. After the edge is pasted, face the inside of the cake base, form a circle, and cut off the excess part.
9. Fold the upper and lower sides in half 1 cm, and stick double-sided tape on the top. Use a ballpoint pen to mark the glue at intervals of 0.5cm. Then cut the paper crease 1 cm with scissors. After all cutting, stick double-sided tape on the edge to form a circle and stick it.
10. Tear off the bottom double-sided adhesive tape and stick it on the bottom tray of the cake. Then tear off the double-sided adhesive tape on it and put another folded finished product on it for pasting.
1 1, take a small square colored paper and cut it by three quarters. Paste three-quarters of a circle around the city, and then press the bottom in order. Do the same above. Roll the remaining quarter into a candle core and insert it into a square.
12. Stick double-sided tape on the bottom of the candle and put it on the cake. Such a three-dimensional birthday cake is finished.