my son was an escape artist also. (thank God he never used the diaper as a weapon though)
we had the standard k-mart crib, one day he figured out he could push up on the top horisontal end rail, then all the verticals fell off the end and he'd climb out. the first time he used the escape to dump a dozen eggs on the kitchen floor so he could slide faster.
so I got out the wood glue and glued the corners down, that held him for about 3 weeks. so one day the kid is out and the end of the crib is apart again. so after we clean up the mess, I ask him to show me how he got out(he had speach problems when he was younger so he couldn't talk but was very clever). he was smiling so proud as he showed me how he had used his 'tools' to escape. (my father in-law had made a toy tool-kit for my son, tool-box, hammer, wrench, and hatchet all carved from wood) he put the wrench around the corner post and slid the hammer handle in for a fulcrum and pried the glue loose on the end. I was amazed.
so I re-glued the the whole thing, glue on every peg, then drilled the corners and put screws in to hold the header down, then wood putty over the heads of the screws so he couldn't 'McGiver' a screwdriver out of a diaper pin or whatever.
that held him 2 days. he couldn't figure out how to take it apart so he just held onto the side rails, then kicked at the ends until he split the end header, and distoyed the end of the crib.
at that point I realised I'd been beat, repaired the crib and put it up for the next kid. then I went and bought him a bed and put vassiline on his doorknob to keep him from wandering the house.
