Test Tube Aliens Good #2 YAGONI Adopt, hatch and raise your own Electronic Test Tube Alien! There are 6 Electronic Test Tube Aliens to collect. 3 "good" Aliens and 3 "bad" Aliens. Each Aliens comes as a chrysalis which hatches when submerged in water. As you bring life to your unborn Alien it will detect light and its electronic heart will start to beat. Over a 7-10 day period your Alien will grow about 8 times it's birth size! Recommended Age Range 7 - up