Had a friend as if I could make her son a yo-yo cake for his birthday. She had no specifics and is very open to what ever I want to do.
Would appreciate your brilliant input!
Depending on how big it has to be....
Maybe you could do 3 layers:
(2) round (maybe 10"?) - I'd say at least 2-1/2 to 3" high
(1) round (maybe 9" or 8"?) - maybe just 1" or 1-1/2" high
Trim the 2 larger layers to be a little rounded like a yo-yo.
Bottom Layer (larger round cake) -
Use fondant around the side & have the strip of fondant tall enough to cover at least 1-1/2" of the top of the layer.
Middle Layer (smaller round cake) -
Rest this on top of the bottom cake (use a cake round if possible) right in the center. Wrap ivory or white fondant around the side of the middle cake & use an exacto knife or something w/ a fine point & carve lines all around it to represent the yo-yo's string.
Top Layer (large round cake) -
Put the top layer on a cake round (I use the standard cardboard ones). The cake round will give the cake (and cake edges especially) support. Cover the layer w/ the same color fondant you used for the bottom & rest it on the top of the middle layer.
Then you can use either real string or a really long piece of thin fondant and have it go from the middle layer & rest on the cake's stand.
Hope this helps at least somewhat. Good luck!