My ds1 is 2.7yrs. I have been doing the naughty step with him since about 18 months.
He will sit there for the 2 minutes, he knows and understands he is there because he is being naughty, but when I tell him he can get up, he will say sorry to the child he pushed, carry on playing and then carry on pushing.
I know it's normal behaviour, but some days it is really bad, litterally non-stop. Today I have done nothing but tell him off and sit him in the naughty spot.
Today he also kept getting up so i ended up strapping him into ds2's pushchair each time.
Ds1 pushes, hits, shouts all the time and most days I can handle it really well and some days I want to cry.