From Kerbal Space Program Wiki
The Jumping Flea is a basic rocket containing most of the parts in the early career mode. It has two Mystery Goo science modules and a Mk1 cockpit, as well as a Flea booster (hence the name).
|“|| The Jumping Flea was originally named after the carnival ride that we salvaged most of its parts from. It might not get us all the way to space, but it will definitely get us started there with a bang!
- Despite being called a Jumping Flea, it never jumps again after jumping for the first time.
- It's impossible to steer.