It doesn't take long for them to generalize from stand on chair to wash hands ---- to stand on chair to reach many forbidden goodies, deadbolts, cookie jars, etc. I put a child safety lock on the gate latch, and they promptly started scaling over the 6 foot chain link fence. These two are privately known to their mommy as instigator and perpetrator.
Hehehehe......I'm very familiar with the "partners in crime" duos. It's never funny at the time, but usually comical when you look back.