In one bunker in the southern city of Ashkelon, a mother says she would like take her children away from the line of fire. But Hamas' missiles are reaching farther and farther, and for the time being, she doesn't have the money to move.

Another Israeli mother, Tal Tzukan, who lives about 10 kilometers (6 miles) from the Gaza border, said last week she's had to regularly rush her two small children into a safe room when sirens warn of incoming rockets.

From her home, Tzukran can also see the bombs hitting Gaza and says she fears for the families on the other side of the border.

"It's hard not to think about the same situation with little kids over there," she said.

Anger at funeral

The Bakr boys had no safe house in which to take refuge. And many people in Gaza have complained they have nowhere to go when warned of impending Israeli airstrikes.

The boys were buried a little more than an hour after their deaths. Hundreds of people attended the funeral, where angry chants filled the air.

The Israeli military says it works hard to try to avoid civilian casualties in its assaults on Gaza, and it accuses Hamas of using people as human shields.

On Wednesday, the Israeli military released videos that it said showed air strikes being aborted because of risks to civilians. It also uses telephone messages, leaflets and nonlethal munitions to warn occupants of homes about to be hit.

But human rights groups are unconvinced by Israel's efforts, as are members of the Bakr family.

"Were those four small boys firing rockets?" asked Sufian, one of the boys' relatives. "They went to the beach to play football."

For Ramiz, the blind father of Mohamed, it's too much to bear.

"I felt as if the world had come to an end when I heard the news," he said. "I wish I had died before hearing he was dead."