Fun Riddles

Question: I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter.

What am I?

Question: You throw away the outside, eat the inside, and throw away the inside.

Question: You may always chase me but you are always about 3 miles away.

What am I?

Question: Three men rob a store but come out completely changed. Yet they continue robbing other stores.

What kind of store did they first rob?

Question: Connect all 9 of the dots using 4 straight lines or less. Do so without lifting the pen or tracing the same line more than once.