Turbo Norimaki is Senbei's and Midori's first and only biological child. He is also a genius surpassing his father.
He is nearly killed by aliens and then revived by them, in the process imbuing him with many super powers including teleportation, flight, technopathy, and telekinesis.
When Goku asked Senbei to fix the Dragon Radar, Turbo quickly fixed it with his psychic powers knowing his dad wouldn't be able to fix it, and after Arale defeated General Blue and accidentally forgot to get the radar back he makes a new one with the parts to Senbei's plane for Goku using his powers. He also undid General Blue's Telekinesis on Goku.
Original Dr. Slump, Remake & Japanese Dragon Ball - Yuuko Mita
Many generic babies shown in Dragon Ball are of the exact same character design as Turbo.