I'm flat when I'm new. I'm fat when you use me. I release my gas when something sharp touches me. What am I?

Answer: A balloon.

More Kids Riddles with answers

More Kids Riddles

I'm found in socks, scarves and mittens. I'm found in the paws of playful kittens. What am I?
If four people can repair four bicycles in four hours, how many bicycles can eight people repair in eight hours?
If it has a quart capacity, how many pennies can you put into a empty piggy bank?
If you have me, you want to share me. If you share me, you haven't got me. What am I?
In what place did the rooster crow when all the world heard him?
It breathes fire in fairy-tales
It doesn't bark, it doesn't bite but it still won't let you in the house. What is it?
It floats like a log. It look likes a log. But it isn't a log. What is it?
It is a place of play on a sunny day. Winter will come and take all the fun, but we'll be back in May. What is it?
It is the transportation of choice for princesses to attend balls.
It looks like it's grizzly but it's actually soft and cuddly. It may be big or small, all stuffed up and ready to be snuggle.
It moves around in circles. We see it as we turn. It keeps us always warm. Always alive and always dying, Across the sky we see it flying, But touch it and we burn.