mom whats to know why he did it? was he jealous of your feeding the babies? or was he being inquisitive?
if jealous - harsher punishment - our emotions need to be under control even at seven, screaming and crying are one thing, destruction is another.
inquisitive - trying to figure out how it worked? - lesser punishment - but still punish enough that the child will not touch the laptop again without permission,
learning about the world around us is entirely different than getting back a mommy for not paying attention to us.
here are her suggestions
inquisitive - a spanking, with two weeks not electronics (since he destroyed your electronic), a little lecture about the cost of such things and now it needs to be replaced
jealousy - a harsher spanking, with two weeks of caring for the babies with you at his side, make him put the stinky diapers in the pail, get you the wipes, get the blankets folded, such as that, while he is choring for you tell him about how much time was invested into his babyhood and its only fair that you also give that time to the babies, and that you love them both equally.