Answer:
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
I am the yellow hem of the sea's blue skirt.
Round and round I go never stopping in a continuous flow. I hang out with numbers each and every day and nothing ever gets on my way. What am I?
Hot tempered and sometimes it blows its top, making a mess of everything.
It's tough as nails, Or soft as snow. People use it for their rink, Some just put in their drink.
People take me on walks and I run and have fun. What am I?