OFF TOPIC: bass amps?

[info at zoekeating <info@zoekeating.com>]

Hi Loopers,

My nephew is learning how to play bass, and I want to get him an amp.

Do any of you have recommendations for bass amps that:

1) have a headphone jack (to save his parents)
2) a 12 year old can lift
3) you can satisfyingly play Black Sabbath through (his favorite band)

I'll take any recommendations off-list so as not to clutter!!

Thank you!!

celloly, Zoe