Up until now Caleb has only bothered Luke on accident...knocking his tower down while trying to scoot around it, coloring on his page because he just wants to color to. In the last few days Caleb has now started to bug Luke just to bug Luke. He as taken to knocking over his trains because he enjoys watching Luke scream, "CAAAAALEEEEEB!" He smiles and laughs at Luke's turmoil. Already this morning Caleb wacked Luke on the back of the head with a toy car to which Luke retaliated by hucking a bigger toy car at Caleb's face. Yep, we had lots of tears and blood!!! Advice??? Pleeease!!!