After the party, we took the girls up to the observatory. Granny came with us. It's neat to take the girls and see how much they appreciate a little more each time as their capacity to learn grows. I can't wait to take them up when they really understand everything and want to know it all. Right now they get it some, but some stuff is still over their heads.
We watched the pendulum go back and forth and knock over the metal when it got close.