I was feeling very creative for my husband's birthday at the end of last year and the kids were only too happy to encourage me.
"We" (and I use the term loosely as I did all the work and they did a lot of looking and licking) made this b-i-g cake...
Which, when cut, had a lovely rainbow inside of it.
Yes it was a bit more work than usual, but it was worth it.
I didn't put icing in between layers, it actually had jam and cream and I didn't even my layers out with a knife, I just added more cream in between.
Thankfully it froze well because we could only eat it slither at a time.