We stopped here with our kids [11 and 8] and had a really nice walk on the foot paths seeing all of the different lava formations. The kids loved it as much as we did. It is crowded in the parking area and in the shorter paths close to the visitors center. However, we had a nice visit. The walks were not very difficult and the crowds thinned out the further you walked. We also really liked the gift shop here. They had a nice collection of Icelandic souvenirs and provided tax free documents that were easy to handle at the airport to get our refund.