figure the serving size for a 6" round 10" square and 12" square topsy turvy cake?
Also didn't someone post instruction of constructing a topsy turvy? Where would I find them?
TIA

I ally do not know about the servings but I can give you the link for constructing the topsy turvy cake:

www.cakecentral.com/article1.html

I hope this helps. It really is not that hard. Just made my first and dh and dd loved it.

Thanks so much

This link should help you determine how many servings per size cake.

http://www.wilton.com/cakes/tiered-cakes/serving-amounts-all.cfm

Hope this helps...