Standing and climbing

I have a real monkey on my hands now. He likes to climb on things lately. He has been climbing on top of his little lawn mower and the laundry basket. I will literally turn my head for a minute or two and he is standing on something he shouldn't be. Usually when I notice he is standing on something he shouldn't be I gasp and say "No Lukas, no climbing!" He just smiles and then cries when I take whatever he is climbing on away. The other day I saw he had pushed his little lawn mower up to his toy box and was standing on top of it balancing on it. Now that he is climbing...that just means he has further to fall. Scary! He is going to get hurt...no doubt about it. What a M-O-N-K-E-Y!!!