I want to make a tiered cake for my daughter's birthday. Bottom cake is 10" x 2" round, 2nd tier will be 8" x 2" round and the top tier will be 6" x 2" round. What do I need to do between the tiers? I am assuming the cakes will be too heavy so I will have to put something between the tiers, but what?
Please help

Yes, you need some dowels inside each cake tier to support the upper tiers.

Here's the wilton page on cake construction: http://www.wilton.com/cakes/tiered-cakes/

Take a look at these and decide which technique might work best for you. If you have any other specific questions, come on back and we'll all help you out with it!

You need dowels like indydebi said but also if your not using plastic plates the hard kind for cakes I use 2 cake boards hot glued together for strength when your totally done take a long dowel rod sharpen the end with a knife or pencil sharpener and hammer it through the middle it makes a 3 tier sturdier.

Hi and Welcome to CC, maltbyjones.

Decoding CC acronyms:

http://www.cakecentral.com/cake-decorating-ftopict-2926-.html

Everything you need to know to make tiered/stacked/layer cakes:

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

Has (links) illustrations of all the most common cake support systems with complete and accurate directions.

Also has popular CC recipes for doctored cake mix, American b/c using Crisco or hi-ratio shortening and fondant. Plus so much more.

Look forward to seeing pics of your daughter's cake!

HTH