As a child it is not entirely clear what he did there. All that is known is that he used magic on two other orphans. Changing the kids forever because what they saw was so frightening.
( Contains Harry Potter and the Deathly Hallows Spoilers. ) when he became Lord Voldemort, he needed a house-elf, so he chose Kreacher, the Black family house-elf. He took him there, and forced him to drink the potion in the basin. He then put the Horcrux Locket in, and filled it again with the potion. Kreacher then apperaited back to the house of black to tell his master what the dark lord had made him do. This is when Sirius's brother Regulus turns on the dark lord and has Kreacher take him back to the place the dark lord took him. After that Regulus took the potion and Kreacher took the locket back the the house of black leaving Regulus for dead as ordered to do so.