Another baby quilt I made last year! You can make this one too. It's really easy and fast to cut out, and pretty easy to sew as long as you don't mind matching up a few points.
Below are a few test photos I took playing with different ways to lay out the triangles. Triangles are fun because they can create so many other shapes and designs just by the way you rearrange them. Since these are scalene (all unequal sides) triangles, it makes the quilt just slightly longer than wide.
The finished dimensions are about 36" x 45", but you could add more triangles to make it a bigger if needed. Cut a rectangle 10 1/8" x 12 5/8", and than cut the triangle in half diagonally. Repeat this step 16 times total, with half the triangles in navy (or another color) and the other half in brighter colors.