PS/SS:CH2:FILLING IN THE TIME GAP

There are about ten years between the events of "The Boy Who Lived" and "The Vanishing Glass", so what on earth has happened during these missing years?

Well, we know that Harry has been using accidental magic to get himself out of a few binds.

Here we learn about three major incidents that happened sometime before Dudley's 11th birthday:

1] Petunia chops Harry's hair off (except his bangs), and Harry goes to bed dreading how he'll be treated at school the next day. He wakes up the next morning to find that his hair has grown back to it's usual length and messy style. It seems that Harry had been inadvertently returning his hair to its usual length and style after every visit to the barber, but these instances were in no way as obvious as a whole head of hair growing back overnight.

2] Petunia tries to pass Dudley's old sweater (a hideous brown thing with orange puffballs) on to Harry, and Harry makes it shrink so small he couldn't possibly wear it.

3] Dudley and his pals chase Harry to pummel him (as usual) on the school grounds, and Harry jumps (levitates himself) onto the chimney of the school kitchens.

What other magic has Harry used before the incident with the glass at the reptile house (besides the events listed above)?