So far as the results of what we know about their ages...
Jazz (24)
Spaz (20-24)
Lori (20)
Eva (25)
Dr Jones (21)
Queen Earlong (40-60)

Hmm... I guess that Devan must be between 50-70, but if hes really OLD, then how cud he be able to run (fast) to his time-machine on the top of the hill to change Carrotus past once again..