You won't sink in lava. Lava is the density of rock. It is rock.
Madness string 47665
Unfortunately this is our first experiment with solar-powered iphones, and we didn't make an array sufficient to power ours for more than a few more minutes for the day.
Talking specifically about children, there's been an idea prevalent over the last generation or so that it's possible to keep a child perfectly safe. In fact, any bump or bruise is a direct failure of the parents to protect their child.