I need ideas for a birthday cake for my 10 year old grandson who is in young marine's. Would appreciate any help.

Hi and Welcome on your 1st post, grandma-deb.

Young Marines cakes:

http://www.flickr.com/photos/dragonflycustomcakes/3378473065/

http://edfrombos.com/images/Young%20marines/cake%20chesty.JPG

http://lh6.ggpht.com/_2aOs2KIIfHc/RSZJsZqWABI/AAAAAAAAAIg/vd6eBYB4ePc/s160/Y%20Marines%202.JPG

http://johnsonmatel.com/Nov10cake.jpg
(This is a HUGE Marines cake.)

And Marine cakes from the CC galleries:

http://cakecentral.com/modules.php?name=gallery&meta=search&type=full&search=marines&album=-&search_user=

Everything you need to know to make, decorate and assemble tiered/stacked/layer cakes:

http://cakecentral.com/cake-decorating-ftopict-605188-.html

The above super thread has popular CC recipes for crusting American buttercreams, several types of fondant and doctored cake mix (WASC and other flavor variations) - and so much more!

HTH