We went off to explore Indian Rock in Berkeley this week. It did not disappoint.J is just now 5 and somehow, once we climbed to the top of the rock (using the awesome stairs cut into the side), I was REALLY nervous having him up there. I like to pride myself on not being a helicopter mom but in this case I just kept picturing him sliding down to his doom and I couldn't hack it. I made us go back down. There was plenty of scope for imagination around the lower parts of the rock.We established our forts...And attacked!Foolishly I did not look up the rock before hand and so could not spout knowledgeably about the geology. Check the wikipedia article or this post from the awesome Oakland blog Oakland Geology. Rhyolite! Neat!We had to leave because I was getting grumpy (I've been grumpy a lot lately) and I had to pee (this park lacks a bathroom making it totally unpractical for me) and we had to go to the store. We'll be back to explore the more north side of the park later though definitely! Also, need to bring more kids so they can like play capture the flag or something!