Of all the inventions that have been made over the years, I am generally considered to be the most remarkable. What am I?

I hold your thoughts in chalky white, erase me gently, and I’m blank as night. A thousand lessons may pass through, yet each swipe lets me start anew.

I can sometimes be cracked, and you can usually find me in a trail. If I describe your mind, your thoughts are probably off the rail.

I’m an onomatopoeia, a sound effect, like brrr. I’m almost the name of a hoppity guy, a friend to a famous deer. I sound like bump, and slump, and a seven hump wump of Mr. Gump. If you’re missing your front teeth, I might be what comes out when you try to say sump. What word am I, the sound when a heavy object meets the ground?

I lie on the ground, cracked and dry, Stirred up when rain falls from the sky. Bathe in me, but don’t get me in your eye. In Mississippi I might make a pie.