Short simple riddles for teens

To you, rude would I never be, Though I flag my tongue for all to see. What am I?

When is your uncle's sister not your aunt?

What goes up and doesn’t come back down?

I am a five letter word and very strong. I become single when you remove two letters from me. What Am I?

I have four legs and a tail. I have no teeth. I can swim and dive underwater. I carry my house around with me. I am a...

I live in lakes and rivers. I eat fish and birds. I have four legs and a long tail. I have lots of pretty teeth. I am a...

Wash it and it isn't clean. Don't wash it and then it's clean. What I Am?

Where do bedtime books sleep?

I taste sweet and juicy. I smell fruity. I feel rough and wet. I look like a bumpy ball. What am I?

When does Halloween come before Valentine's day?