This is a nice modular 6-pointed star by Tomoko Fuse
Fold paper in half on the vertical horizontal axis. Crease well and unfold.
Fold both sides to meet in the center. Crease well and unfold.
Fold both sides back to the center.
Fold up the bottom tip.
The crease should extend from the center crease to the left edge of paper.
Unfold the paper.
Recrease the 2 diagonal creases into valley and mountain folds as shown below.
Fold the right side back to the center. And this completes your modular unit!
We need 6 of these to make a modular 6-pointed star
Bring 2 units together to start the assembly. Unfold the right side of Unit#2.
Fold the bottom flap of Unit#1 over and tuck it into the left flap of Unit#2.
Repeat the rest of the units.