The Lego® Technic Destroyer Droid was released in 2000. It can fold up into a wheel configuration, when it is rolled the movement causes a button to be pressed, which makes the droid spring open.
The Lego® Technic Destroyer Droid was released in 2000. It can fold up into a wheel configuration, when it is rolled the movement causes a button to be pressed, which makes the droid spring open.