Victorian Sponge Recipe via The Stone Soup... includes helpful tips for getting the correct batter consistency as well as how to substitute for self-rising flour. I'll be making this recipe "open-faced" with just one layer of sponge cake.
Maze Haven: Create a horizontal and/or vertical labyrinth of cubby holes, pathways and hideouts for your rabbit to explore. Change just the inside by switching around the panels. This toy feeds into your rabbit’s natural instinct to map surroundings as a survival tactic. You can arrange the maze differently to keep your bunny on her toes.