Clean riddles

David's father has three sons : Snap, Crackle and _____ ?

The cost of making only the maker knows, Valueless if bought, but sometimes traded. A poor man may give one as easily as a king. When one is broken pain and deceit are assured.

Never ahead, ever behind, yet flying swiftly past; for a child, I last forever; for an adult, I'm gone too fast. What am I?

I live in the ocean. I like to eat crabs. I can change colors. My eight legs are called tentacles. I am an...

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

What kind of soda must you not drink?

I travel all over the world, but always stay in my corner. What am I?

Had at work day and night, it counts the numbers over and over. Although it counts all its life, it never gets past twelve.

What has a head, a tail, is brown, and has no legs?

A horse travels a certain distance each day. Strangely enough, two of its legs travel 30 miles each day and the other two legs travel nearly 31 miles. It would seem that two of the horse's legs must be one mile ahead of the other two legs, but of course this can't be true. Since the horse is normal, how is this situation possible?