Men armed with a shovel broke in to a North Warrawong house on Sunday.
Police said four males, a female and a 15-month-old child were at the First Avenue home when three men, one armed with a shovel, forced their way into the home at 3.20am.
The males smashed a window of the house then left.
They stole three mobile phones.
Police do not have a description of the offenders or the car they drove off in.
Any witnesses are asked to contact Lake Illawarra Police or Crime Stoppers.