What is so fragile that saying its name breaks it?

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

It belongs to you, but other people use it more than you do. What is it?

What runs around the whole yard without moving?

What has 88 keys?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Railroad Crossing, look out for the cars. Can you spell that, without any R's ?

What goes up but never comes down?

_ _ _ IE _ _
_ _ _ IE _
_ _ IE _ _
_ _ IE _
_ _ _ _ IE

Like you see, some letters have gone missing from these words that contain the IE pair at some or the other place. The letters that will be used to fill the blanks are given below. Use them and form meaningful words. Can you do that?

A, C, D, F, H, K, L, M, N, N, O, R, R, S, S, S, T, T, Y and Y.

What is at the end of a rainbow?