Take rava, curd and salt in mixing bowl. Add water as required depending on curd thickness.
Give a good mix and allow it to soak for 2 hours.

Pour the batter to an idli maker and steam it covered for 15 minutes on medium flame.

Furthermore, allow it to rest for 2-3 minutes then unmould. Arrange idlis on a plate making to look like caterpillar. I have used peanuts to make eyes, lemon skin for mouth and stem of curry leaves on the top.
Finally, serve hot with chutney and sambhar.