A visit to the Snaefellsnes Peninsula with kids is a magical experience. It packs a little bit of everything that makes Iceland special into a small region. The Snaefellsnes Peninsula has volcanoes, lava fields, mountains, waterfalls, fjords and big waves on rocky cliffs.
If you only have a few days in Iceland with kids, the Snaefellsnes Peninsula is a good choice as you will see it all. There are plenty of interesting, outdoor activities for kids as well.