>>28514923 (OP)For your 4+ years old little kid you could get small size, slow 12 voltage electric toy car that does have 4mph top speed. Like a John Deere Gator HPX, Lamborghini Veneno 12v as examples. But this is only good idea if you have a farm land or suburb with enough large backyard(where there are no any AHB nests nearby so your kid wont get stung to death). Cant do this at your front yard so your kid wont be hit by car(example kid disobeys you and drives into car traffic lane) or somebody kidnapping your child away from you.
Second alternative, but worse one because kids can get easily addicted to video gaming, wasting their whole lives in virtual word rather than staying in real world. Is to get a good car driving focused video game, also get gaming car wheel+pedal set. Then put your kid to play car video game using the wheel+pedal set. Examples Thrustmaster T150, Logitech G923 and yes gear shifter is often bought separately as additional feature.