A commemoration service will take place in Warrington town centre on Tuesday to mark the 25th anniversary of the Warrington bombing.
Two IRA bombs exploded on Bridge Street on March 20 1993, killing three-year-old Jonathan Ball and 12-year-old Tim Parry.
Jonathan died at the scene while Tim died five days later when his life support was switched off.
More than 50 people were injured in the attack.
The blasts happened within a minute of each other, one exploded outside Boots and one outside an Argos store. The area was crowded with shoppers.
No one was every brought to justice for the atrocity.
The IRA claimed responsibility for the bombings but blamed British authorities for not acting on warnings it had issued.