Answer:
What is the word that even in plain sight remains hidden?
Which popular cheese is made backwards?
What has a head and a tail but no body?
I'm a starchy plant tuber that is one of the most important food crops, cooked and eaten fried, such as french fries.
Tickle with your fingers and a song it will sing. Be careful, though, you may break a string. What is it?
People take me on walks and I run and have fun. What am I?