Telling your baby no..am i crazy?

Virginia
So my 8 month old is EXTREMELY curious. He has his walker figured out and has found our living room and kitchen. That includes the cabinets, shelves...... everything! I have had to start the word no in calm tone of course and I know he is understanding what I say because the little booger smiles while he getting into this he shouldn't even when put away in a sealed container. He learned the game of drop the toy off the high chair and mommy watches him because he watches me first then drops it....he is a trip! Both of my boys will have in shape! Are you saying no yet?