Jazmic my baby girl is 15 months as well and her thing is to go to the entrance and throw the shoes and boots around. She knows she is not aloud to touch the shoes and even though I say "no" or present a different toy or go take her hand she would look at me straight in the face, go "aaaaahhh" and do it again. After trying so hard and considering everything from a gate to hidding the shoes I came to realize that she does this when she is missing my attention, when she needs an extra hug or when she is hungry or thirsty. It's her way of getting my attention ... attention is attention wheter it be good or bad. Maybe this applies to your son too!
If not, I think redirection and repetition are the only appropriate things for this age. I personally think a time out is not yet applicable for this age.