DIY lace denim shorts.  Easy.  Cut an old pair of jeans, fray the ends and sew on lace trim on the inside.  Perfect for the beach!  Tutorial below:

http://www.refinery29.com/i-diy-how-to-make-3-pairs-of-denim-cut-off-shorts

DIY skirt

Great for the beginner seamstress.  Made with orange and white gingham fabric.  Tutorial below is the one I used-but my version is a little modified.

http://sweet-verbena.blogspot.com/2011/06/very-simple-skirt-tutorial.html