Educational

• math and war games

Model: Math Marvel
Battery: 9 volt
AC adapter:
Year: 1980
Chip:
Info:

• Toys and Speech Games

Model: Math Star
Battery: 2 x AA       
AC adapter:
Year: 1988                              
Chip: CD4616
Info: The Math Star is preprogrammed to teach the basic four mathematic functions through different games. This educational toy was rated by Texas Instruments for childrens aged between 6 and 11 years.

• math and war games

Model: Mickey Math adventure
Battery: CR2025
AC adapter:
Year: 1983
Chip:
Info: manufature China

• math and war games

Model: Mickey Mouse
Battery: solar
AC adapter:
Year: 1983
Chip:
Info: manufature China

• Toys and Speech Games

Model: Mouse Computer
Battery: 4 x AA       
AC adapter:
Year: 1993
Chip: TSP50C11 (CSM11128A), HD44780
Info: Texas Instruments introduced with the Talking Master Mouse Computer the first kids' computer with a real working mouse. 

 Like all games or calculators that use LCD displays, they may have display problems, missing segments, extra characters, etc. Simply disassemble the display and clean both the conductive rubber tabs and the glass display with isopropyl alcohol.