Hi can someone tell me if there's a tutorial on how to make a diaper bag cake? also how  the powder cologne and cream bottels label looking so real?please help

Those realistic looking labels are edible Pictures. Some local cake supply stores offer them for sale and some folks own their own edible printer.

There are lots of handbag tutorials on youtube here's one that you can adapt to a diaper bag.....

Some accessories ..........

http://www.make-fabulous-cakes.com/princess-crown-cake.html  (scroll to the bottom for the baby rattle)

http://deborahhwangcakes.blogspot.com/2012/10/how-to-make-fondant-baby-converses.html

lynlees.com/2013/09/binky-baby-fondant-pacifier-tutorial.html

carolinecakes Thank you