One particular favortie spot of mine in the city is "The monster" -
a huge sculpture/playground in the neighborhood Kiryat Yovel.
what's a sculpture/playground you ask?
Well, it's sculpture by the Artist Niki de Saint Phalle, of a 3-tounged monster. the monster can be entered through a flight of stairs on its back, and all of its tongues are slides you can slide down.
would highly recommend going there or stopping by on the way to Ein-Kerem, especially if you're travelling with kids (but in any case if you have the chance).