Small Bedroom Tube Amp

The Peachtree amps, as mentioned by uberwaltz, are a good option but they are not tube amps.

There are many good, inexpensive tube amps available that are certainly more than good enough for bedroom use.  I would suggest that you take a look at the *original* Sophia Electric Baby Amplifier.  It was a killer product that was designed by a U.S.-based audio firm (although the amp was made in Hong Kong).  These are available used for around $350 and I doubt that there there is a better performing tube amp at that price.  Replacement tube sets are very inexpensive, these units are built like a tank and they are easily modified/upgraded if you are so inclined.  I used one in my office for years.

Correct not a tube amp as such but I guess the right term is they use a tube "buffer" in the preamp section.
Gives some of the sound of tubes without the cost and complication of a full tube array.
I found the sq on my Nova to be a lot richer and fuller with more bass than the previous admitedly older class d integrated 

To the OP. I would select the speakers first. To br3098, the Peachtree Nova is a hybrid, as it uses a tube at the input ( as stated by uberwaltz ). Enjoy ! MrD.

musical paradise mp-301 amp
MP-S1 MK2 Bookshelf speakers 
Both punch far above their price....but do you really want hot tubes around a child 👶🏻?

Let me play devil's advocate here. Haven't seen this mentioned. Don't know how little your little ones are, but glowing tubes, its like a moth to light. They could seriously burn. Something to think about.