"And as they were eating, Jesus took bread, and blessed it, and brake it, and gave it to the disciples, and said, Take, eat, this is my body. And He took the cup, and gave thanks, and gave it to them, saying, Drink ye all of it; For this is my blood of the new testament, which is shed for many for the remission of sins." Matthew 26:26-28
"Since that night Christian people in all the world celebrate the Lord's Supper by eating bread and drinking wine in memory of the death of our dear Lord. The bread and wine are signs that we share in the forgiveness of sins which His death made possible. To those who truly love Jesus, and who come to Him to have their sins forgiven, the Lord's Supper is sacred." ~ Catherine F. Vos, The Child's Story Bible
Remember Him to your children. Teach them what this was (and is) all about.