Here is instructions on how to make the flower part of the origami tulip.
Use a square piece of paper (preferably origami paper). If only one side is colored, make sure the colored side is facing down.
Fold the square in half so the two color sides match up on the outside to create a rectangle, then unfold.
Fold it the other way so the other two sides match up to create a rectangle, then unfold.
Now fold the lower left corner to the upper right corner to form a triangle, then unfold.
Fold the lower right corner to the upper left corner to form another triangle, then unfold.
Make sure the colored side is facing up. Now bring the left and right creases to the center and it should collapse into a triangle.
Fold the left corner to the top corner.
Then fold the right corner to the top corner.
Turn the figure over and repeat step 7 by folding the bottom corners to the top corner.
This is where it starts getting a little tricky. Fold ONLY the top two layers of the right side to the left.
Turn the figure over. There should be three layers on the right side. Once again, only fold the top layer of the right side over to the left.
The sides with the pockets should be facing down. Fold the top right and left layer corners into the center to create a kite shape.
Flip the figure over and repeat step 12 to form the kite shape by folding the right and left corners to the center.
Now on one side, insert the right flap all the way into the left pocket.
Turn the figure over and repeat step 14 by inserting the right flap all the way into the left flaps pocket. The bottom should have two holes that look like a bow tie.
With both hands bring the side with the two holes up to your mouth and gently blow. This should puff the tulip out.
Turn the tulip to the top and carefully start to peel the petals down a little above half way. You have just created a beautiful tulip bulb.