Jibber:
Jibber, age 7, the older fraternal twin by a few seconds, finds the world an exciting place. Things are happening all around him, which give him really good ideas. Jibber is a doer. Why not be the first to Mars? Or why not create a monster in the basement? Jibber never seems to have trouble convincing Jabber to join him!
Jabber:
Jabber is the intellectual scientist. Thinking and planning are what is interesting in his life. Jabber has a quiet confidence. He doesn't argue with his brother and doesn't have to be first; being right is always so much more gratifying!