For sims castaway how do you get past the geysers?

Answer 1

To get past the geyser, you need a stone chisel and a stone hammer. Walk up to the big rock and inspect it. Your sim will use the chisel and the hammer to push it down into the geyser. :)

Answer 2

You have to sort of climb up on to the rock to the right and you'll get the option to "inspect rock". then when you click on that your sims pushes the rock onto the geyser and volia!!