Background Pony #CD77
I haven't looked at the other vehicles, but that space shuttle is nearly twice as large as it should be. Nasa.gov has the Endeavor's wingspan at 23.7 meters, but this chart pegs it at 45-ish meters.
@Background Pony #28D8
Also you wanted to know why it's call "My Little Pony", well before it's called "My Little Pony" it's called "My Pretty Pony" and the toy is a lot larger than the current one i mean look here's the comparison of My Pretty Pony and MLP Gen 1.
So Why it's call "My Little Pony", because the toy lines is a lot smaller than the Original "My Pretty Pony".