Boo to spammers! I love making mobiles for new babies. Quilts and mobiles for new babies are the best.

I've made a cloud and rain one before but that bowler hat and mustache one just beg to be copied! So cute!

The cloud and mustache mobiles are cute, but I wish they were designed with baby's perspective in mind (viewed from below) rather than from mommy's perspective (viewed from the side).

Totally with ISA, I hate that most mobiles you see (even store bought) look cute to mom and dad but for the baby its very meh.

We bought the most colorful, rotating one I could find and I got down to his height to pick them and see what looked most interesting. The big draw of ours is that is does move. Not at all knocking homemade mobiles but I find many times they can be more cute to give the parents or make as parents but do very little in terms of visual stimulation for the baby.

Save the cute mobile for the changing table. Get one that does something for the crib. The mobile was the only thing that would hold my daughter's attention long enough for me to get in a shower for the first few months.

Made a mobile like the one below for my nephew and he loved it - totally entranced during changing time! Super easy - lg sewing hoop, string, reversible scrapbook paper and about an hour. All-in less than $20
Totally does not have to be perfect, just make sure the pinwheels have room to spin independently. Literally the little guy would be fussing and you could blow on the wheels to start them spinning and he totally was distracted for just long enough to get diaper duty done!
http://4.bp.blogspot.com/-PtZPNoMFrOA/TWU2WWt_zWI/AAAAAAAAFJI/SVuBGMojdi4/s320/pinwheels7.JPG