“Has {child_name} worked out how to flick a light switch on or off?”
Follow-up: “Does {he_she} do it on purpose — maybe to signal the light — or more by accident?”
Not yet
Hasn't shown interest in light switches
Emerging
Bats at the switch, sometimes it moves
Developing
Can switch a light on or off when lifted up to reach it
Secure
Operates switches confidently and sometimes switches the lights to signal something