Good idea if you don't want to deal with the mains.
Some Ikea lamps come with nice 24v AC wall warts. They're quite useful as they can shift a couple of amps no problems. They do have 2 pin DIN sockets though which is a bit odd if you ask me. DC seems to standardise on 2.1mm center-positive plugs/sockets although there are exceptions so you have to keep your eyes peeled.
I use one as of those Ikea lamp transformers as a "portable" bench power supply. I have a bridge rectifier, couple of electrolytic caps with bleeders and two basic LM317 circuits straight from the datasheet with 4mm plugs attached to a bit of 4mm aluminium stock that gets plugged into it. It's not even in a box and is point to point wired. Caps are held on with cable ties
I was going to do a dual rail 317/337 version with a current limiter but I haven't got around to it yet. Gets a bit warm but not enough to cause any problems. If it blows up, it costs about £3 to make a new one so not the end of the world.