Answer:
A hill full, a hole full; yet you cannot catch a bowl full. What is it?
What can be underwater, under fire, on fire and taking water all at the same time?
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
You throw away the outside and cook the inside. Then you eat the outside and throw away the inside. What did you eat?
You heard me before, yet you hear me again, then I die. Until you call me again.
People take me on walks and I run and have fun. What am I?