Some karaoke machines have connections for keyboard and guitar. For the 6-12 age group, the RS823 (30") and RS827 (32") (intermittently available as they tend to go out of, and come back in, stock) children's guitars include the Plug 'N' Sing DVD microphone.
Great for performance venues, the GigstarProII provides ability to balance vocals with plug-in guitar or keyboard, and includes an AM/FM tuner as a song source, in addition to its multi-format karaoke player.
Two karaoke guitar amplifiers with recording capability are the DV121 and the GP445 guitar amplifier and recording studio. Connect these to your TV and karaoke player to see lyrics, if you are utilizing karaoke software.
Compare these karaoke machines and guitar amplifiers with the TASCAM trainers available at www.MusicStudioStore.com. TASCAM trainers will play CDs and allow you to read sheet music sold with the CDs, at your preferred tempi and pitch. Graded sheet music is available, so that you can start learning at a beginning, intermediate, or advanced level in a variety of styles, with this extremely affordable trainer.