TOON RIDDLE NO FURTHER A MYSTERY

Dilemma: What runs but never walks, contains a bed but never ever sleeps, a mouth that never ever speaks, along with a head that in no way weeps?138. I can be found in many different colours And that i get greater Once i’m comprehensive. I'll float absent should you don’t tie me down And that i can make a loud seem if I crack. What am I?l) You