Honeythorn
Sugar coating and nicely nicely? I don't think so
Flat pebbles could be glued in such a way as to make a reasonably natural cave, and I agree with the use of wood. Smaller bits surrounding and interconnecting with a larger piece should work.
Surrounding the cave with plants or tying java moss onto it ( if possble ) can help conceal it and make things look more natural.
Surrounding the cave with plants or tying java moss onto it ( if possble ) can help conceal it and make things look more natural.







