To get to the cache you need to swim or to use a boat. The first option is better, because this is a very popular swimming area. The isle itself is beautiful and part of the navigation system for Rab.
To find the cache you don’t need to climb down the deep hill. Despite the terrain, the cache can be found with a child (and was hidden with a 8-year-old child).
This was one of the best adventures during our 7 week holiday in Croatia, according to our kids. This is a very nice place to visit and a nice adventure to swim to the island. Just don't let the child go to the cache alone. If in doubt or unexperienced, don't go.
The cache contains a pen and a log book.