At 1/6 to scale of the original arcade hit, this mini Space Invaders arcade game is in fact a money bank for all your hard earned coinage.  You can enjoy all the nostalgic sound effects each time you make a deposit, which, or at least for me, would be more than enough motive for me to save.  Based on the translated site the Space Invaders game is completely playable, joystick and fire button included

Takes 2 AA batteries in will go on sale in Japan later this year for about $59 (5775 yen).

[Takaratomy via Technabob]