I cut my foam core pieces the way I had planned to this point. I decided to use the two matt board pieces for the rabbit hole.
Here you can see I have used the toilet paper tube.
I have also added back the foam core cut out with a hole in it at the top. I plan to have greenery making the hole smaller. Note it isn't glued in yet - I will do that after I paint the tube.
I have also painted the tube. I plan to cover it with something maybe some 'dirt'.