I'd go to see people like The Beatles, ABBA and and Elvis (at their height) in concert (and buy Elvis an exercise mchine for when he's older
go back to the beginning of creation and have a look at Jesus or the Ancient Egyptians, so you could see the pyramids being built or something.
Then make sure Buddy Holly's and John Denver's plane didnt start up. Alter Saddam's stair-carpet, and demand a "proper" recount of votes in the 2000 election
Oh, and push Adolf Hitlers pregnant mother down a flight of stairs.
