Here is a pic for you to use.
Maybe make the cake round and draw the top and top part of the sides as the trampoline. Then make grass on the sides for 'under' the trampoline.
Hi Sue...
A couple from the galleries:
http://www.cakecentral.com/modules.php?name=coppermine&file=displayimage&meta=search&search=tRAMPOLINE&cat=0&pos=0&search=tRAMPOLINE
http://www.cakecentral.com/modules.php?name=coppermine&file=displayimage&meta=search&search=Trampoline&cat=0&pos=1&search=Trampoline
But you can search using Drum because it really is just a big drum sort of and get more ideas from the comments on how to apply.
Maybe using the pic fourangelsmomie provided... do the top and pipe the legs on the sides under the top border using it as a rim, ...then fill in the rest of the sides with grass as she suggested...
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