The jumperoo was fairly easy to set up, a few clicks of parts...until we got to putting in the batteries. The positive sides were directly next to each other, that is the springs were on the same side. Now, I'm not an engineer but I've seen enough battery packs to know that's not the way it works. She sat in it for about 20 mins without the music or lights and became bored. It's a shame because she seem to like the freedom it offered.