1. Danny has thought of a new kind of transportation.
(1) think of“认为;想起”
(2) think about“考虑”
e.g. The teacher can't think of his name.What are you thinking about?

2. With my invention, you don't need a plane to fly.
with的用法:
1)具有;带有 The teacher came in with a book in her hand.
2)与......一起 I go home with her.
3)用....We see with our eyes and hear with our ears.

What's your future transportation?Use your imagination and have fun!