Thanks so much everyone for your help and advice!!

I'm not on FB so can't actually view those pics, sorry! I really wanted to see them too.

My friend has the glass pyrex cooking bowls in the correct sizes that I need to make the cake so I'm going to borrow hers rather than buy my own as I don't need to buy more mixing bowls for the sake of it.

My main concern is - do I decorate both sections THEN put the top of the toadstool on? Or, do I follow the book?? and do exactly what it says?

Getting the lollies for the cake this week and the cake mixture..... yum.

Yeah with the icing - I'm thinking of using Betty Crocker (its so yum too!) because being Feb, the icing tends to sweat a bit no matter what I do