Bought two. (Good to buy 1 item for family, and then 1 for gift toward multitude of birthday parties).  So one came with a short in the circuitry and couldn't shut it off. -To be returned. The switch on 2nd worked, but the orbit is weak.  If it's not exactly balanced, (as children often  change the precise orientation), the orbits can get stuck.  If imbalanced, the gravity of Jupiter and Saturn's large mass really affects the orbits, just like it would in real life, but that's NOT the lesson here.  Maybe buying an AC adapter will give some power to overcome.??(Though i wish it came with the setup.)  Motor is indeed loud'ish, but that reminds us to shut it off.  Haven't tried the constellation dome, but since light is dim, I'm not expecting much on the ceiling.  From reviews and product choice, it doesn't seem like Amazon is carrying high quality products for this category, unless nobody is able to emulate the perfect balance of our solar system.  I'll keep the functional one for this price, since it's the 1st  time my PreSchooler may begin to envision what's going on out there. (Having something motorized really shows a point of view that the universe is on "autopilot" with unseen forces.)
Bought two. (Good to buy 1 item for family, and then 1 for gift toward multitude of birthday parties). So one came with a short in the circuitry and couldn't shut it off. -To be returned. The switch on 2nd worked, but the orbit is weak. If it's not exactly balanced, (as children often  change the precise orientation), the orbits can get stuck. If imbalanced, the gravity of Jupiter and Saturn's large mass really affects the orbits, just like it would in real life, but that's NOT the lesson here. Maybe buying an AC adapter will give some power to overcome.?? (Though i wish it came with the setup. )  Motor is indeed loud'ish, but that reminds us to shut it off. Haven't tried the constellation dome, but since light is dim, I'm not expecting much on the ceiling. From reviews and product choice, it doesn't seem like Amazon is carrying high quality products for this category, unless nobody is able to emulate the perfect balance of our solar system. I'll keep the functional one for this price, since it's the 1st  time my PreSchooler may begin to envision what's going on out there. (Having something motorized really shows a point of view that the universe is on "autopilot" with unseen forces. )