pick locks......
OK, not entirely accurate. DH bought a lock picking set. Has been messing around with it for about an hour. Now given DS a turn. No success as yet.
Am I going to look back on today as a bad day and a sign of things to come?
What have you shown/taught your DCs that you later looked back on thought WTF did we do that for?
(Disclaimer...DH has never broken the law bar some weed in his 20s and has the most moral/greatest integrity of anyone I know. So I am pretty sure he is not going to be heading off breaking in to anyone's house.)