(I'm running out of ideas)

It was your birthday so Luther had to give you a gift and he had the idea of giving you a bicycle (since that's what human children get for their birthday most of the time, right?)

He prepared everything, even bought knee and elbow pads and a helmet so you wouldn't get hurt while riding

It would be a perfect gift if you know how to ride a bike, but that's okay! since your older brother is there to teach you!

now you had a helmet on, knee pads and elbow pads while Luther held the seat on the back of the bike while you were on the bike "Ready." He says while checking if the helmet is ok "You can start now I'm holding you, you won't fall." He says in the same monotone voice of his while it seemed a little comforting (trying to be even though his voice and expression are the opposite but he still didn't want you to fall or get hurt)