u can get all sorts of cutters for butterflies, then you could use gumpaste/ fondant. you could attatch colours in different layers? or i imagine u could pipe in royal icing as well. and just use wire for sugar flowers when any method is still wet - bigger butterflies would need a bigger wire. i hope that helps a little!
mount the b'flies on floral wires. Wrap the wires up about 3" from the bottom in floral wire &/or stick them into a plastic drink straw which is in the top of the cake.
thanks guys for replying, your info helps alot