I didn't let my son to use 學行車 because he will think that walk means "legs pushing on floor" & then he will go backwards (I see some kids are like that). It's better to train him by trial & error; he'll walk by holding the sofa, chair....; let him try to fall down & stand up again (of course under safe condition). Finally, my son know to walk around 1 year old. My friends' kids are also like that.