Both of the Alien Children have unique designs, as every Alien on their planet does. The first Alien has a large, blue helmet object with two little spikes on his head from which a pair of eyes stitch out. Like his Father, they have a transparent body with tentacles sticking out. The second Alien Child appears to look very similar to a Penguin. They have no mouth but they do have a pair of eyes. Their body color is white and blue. Like their Mother, their body's shape is somewhere in the form of an M and they have a pair of long legs.
The only bit of personality that we gather is their obliviousness to their history.
- Their exact genders are unspecified.