I didn't see the Mattel Aquarius listed in our retro computers section and I thought I'd add a thread about this rather unique machine.  This was Mattel's attempt at joining the home computer business.  Below is an excerpt from Wikipedia and a review/unboxing video that looks at the machine and all its components.

From Wikipedia:  Aquarius is a home computer designed by Radofin and released by Mattel in 1983. It features a Zilog Z80 microprocessor, a rubber chiclet keyboard, 4K of RAM, and a subset of Microsoft BASIC in ROM. It connects to a television set for audio and visual output, and uses a cassette tape recorder for secondary data storage. A limited number of peripherals, such as a 40-column thermal printer, a 4-color printer/plotter, and a 300 baud modem, were released for the unit.

Mattel Aquarius Computer (Retro-Zone.Org)[/align:3za2qzyr]