My 17 month old loves this.
Teaches kids about the different kinds of switches, plugs, keys, and a potentiometer.
Lots of color and interactions but no sound other than the click of the switches.
The case is a soft wood, well sanded,, with rounded edges, splinters are unlikely.
The battery compartment is under the power plate and it takes two AAA batteries.
My only complaints are lack of a main power switch and that the case is sealed in the event a switch breaks. I'll get it open if I need to, but it would be nice if I didn't have to split the case to do it.