I’m taking this from* A Treasure Chest of Traditions* by Monica McConkey. Make a dough wreath with toothpicks stuck in it. It will look like a crown of thorns. When someone does an act of reparation, break off a toothpick.
Here’s another from the same book: To do reparation for sins committed in the Garden of Gethsemane, Collect thirty pieces of silver (Quarters, nickels, dimes) to make up for Judas. Give to the poor/collection box. Pray for an hour to make up for the sleep of the disciples (not necessarily a sin, I know) and place a banner in a prominent window professing “I believe in Jesus.” three times to make up for Peter’s denial.
Others I’d do: stations of the Cross. How about designing/coloring a depiction as you pray? The Gospel of the day–read and discuss. Also, you could make several sets of resurrection eggs to be given away. As you make them, you could discuss and pray about each egg. Resurrection eggs have 12-18 Plastic Easter eggs–each one containing a symbol of the Passion. One is empty to protray the empty tomb.