[leyash]

For DS1:
Grounding (not leaving the house), taking away game privileges, reading (time will depend on offense), answering questions on previously read pages, writing sentences, cleaning.

For DS2:
Time-out (standing in the corner) or sitting in a room by himself, taking away game privileges, loss of television, cleaning, spanking (rarely), writing sentences.

for DS3:
Time-out, spanking, taking away game privileges, cleaning. He hardly gets punished, though.