What Im not 100% sure of..is what happened at the Ramsey house on 12/25/96? Did they have kids over? Friends of JB and Burke?

Some children did spend time inside the house during the course of the day. From the Ramsey book DEATH OF INNOCENCE, page 5:

Once breakfast was over, the day unfolded with the usual chaos of the neighborhood children coming and going, reporting on the loot that had been left for them. The boys from across the alley drifted in with their remote-control toys, and they all went outside to race their cars up and down the street in front of our house.