Answer:
I am the kind of an ant that's good at math. What am I?
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
Lovely and round I shine with pale light grown in the darkness a lady's delight.
Squeeze me and I cry tears as red as my flesh but my heart is made of stone.
I am there when you sit, but gone when you stand. What am I?
A little house full of meat, no door to go in and eat.