Morning Time

So I wake up this morning to find my son playing with the blinds again. He's only 17 months old, how do I get him to listen and stop breaking the blinds?  I get started on breakfast and have decided to give my boys a bowl of cereal. My son, the one who broke the blinds decides to push his brother out the way and in the process knocked the bowl out of my hands. I had to discipline him with a spanking on the hand and butt and then I put him on time out. Is it wrong for me to spank him at this age. He's constantly shoving his brother and being very selfish. So my question is how do I handle those kind of situations without spanking any of them?