So here is link to a PDF doc that lays out activities, discussion starters, prayers etc. for use thorughout the week running up to Easter:

Entering as a family into a period such a holy week gives you the chance to work on something over a few days. Something as simple as printing off depictions of key events throughout the week (or printable colouring pages) which can be put up in the home. That can create a montage of Jesus’ journey through the cross to resurrection.

There are so many incredible ways of talking about all that Jesus acheives in His Passion. We all face the temptation to reduce this moment to a single idea - often something such as forgiveness of sins. As true as that may be, it falls drastically short of all the Bible has to teach us. His death is about victory over evil, cleansing the whole of creation (including us!), redeeming death so that it is no longer something we need to fear but becomes a servant that carries us to Christ, it gives us an example to follow, a revelation of God’s heart to delight in, and a vision of true spiritual power to develop. His resurrection is not simply His triumph over death. It is the birth of a new creation, our being ushered into a new way of Divine living. It is the securing of our future, the fulfilling of the past Levitical Priesthood, and the guarantee of our righteousness.

As a parent (or grandparent) you might it helpful to revisit out Jesus Centred Life term on the Work of Christ. that will give you plenty of ideas about how to talk with your kids about all that is acheived in the first Easter. Or if you are using ‘To be A Christian’, have a look at Q&A 59-70… I’ve included them here in case its useful. If it isn’t, jsut stop reading here - there’s nothing else after the questions below except one other downloadbale idea - the Holy Week Calendar!

59. Why did Jesus suffer?

Jesus suffered as a sacrifice for our sins so that we could have peace with God, as prophesied in the Old Testament: “But he was pierced for our transgressions; he was crushed for our iniquities; upon him was the chastisement that brought us peace, and with his wounds we are healed.” (Isaiah 52:13–53:12, see 53:5; John 1:29; Romans 6:23; 1 Corinthians 15:3–4)

60. In what ways did Jesus suffer?

On earth, the incarnate Son shared physically, emotionally, and spiritually in the temptations and sufferings common to all people, yet without sin. In his agony and desolation on the Cross, he uniquely suffered in my place for my sins and, in so doing, revealed God’s love and compassion for fallen and suffering humanity. (Psalm 22:1–24; Matthew 4:1–10; 27:26–50; Hebrews 4:14–16)

61. How do Jesus’ sufferings help you?

Jesus has experienced our sufferings, understands our sorrows, and is able to sympathize with our weakness. Therefore, I should bear my sufferings with perseverance and hope, for my Savior is with me in them, and through them I will come to know him more fully. ( Job 9:32–35; Psalm 22:22–26; Isaiah 53:4–7; Luke 4:1–13; Hebrews 4:14–5:10)

62. Why does the Creed say that Jesus suffered under the Roman governor Pontius Pilate?

The Creed thus makes clear that Jesus’ life and death were real events that occurred at a particular time and place in Judea in the first century AD. (Psalm 2:1–6; Luke 3:1–2; 23; Acts 4:24–28).

63. What happened at Jesus’ crucifixion?

Jesus was executed as a common criminal. He was scourged, mocked, and nailed to a Cross outside the walls of Jerusalem. Though believing in christ humanly a miscarriage of justice, his execution fulfilled God’s plan of salvation. (Psalm 22:1–21; Isaiah 53:8; Matthew 27:22–26)

64. What did Jesus accomplish on the Cross?

Jesus fulfilled the Scriptures by dying on the Cross as a sacrifice for sin in obedience to his Father. He thereby showed the depth of the love of God for his fallen creation, satisfying the justice of God on our behalf and breaking the power of sin, Satan, and death. (Leviticus 23:18–21; Psalm 34:15–22; Colossians 2:13–15; Hebrews 10:11–14)

65. What does Jesus’ death mean for you?

Jesus bore my sins and died the death that I deserve, so that I could be saved from sin and eternal condemnation and reconciled to God. (Psalm 32:1–2; Isaiah 53:10–12; Matthew 20:28; Romans 5:8–10; 2 Co rin thi ans 5:17–21)

66. Why does the Creed make a point of saying that Jesus died?

The Creed makes the point to emphasize that Jesus died a real, bodily death such as all people face because of our sins. (Psalm 22:14–15; Isaiah 53:8–9; Matthew 27:45–50; John 19:30–35)

67. Why does the Creed emphasize Jesus’ death in this way?

The Creed emphasizes Jesus’ death to counter suspicions that Jesus did not truly die on the Cross, to celebrate the fact that he died there to secure our salvation, and to prepare our minds to grasp the glory of his bodily resurrection. ( John 19:31–34; 1 John 5:6–8)

68. What does the Creed mean by saying that Jesus descended to the dead?

That Jesus descended to the dead means that he truly died and entered the place of the departed. (Psalm 16:9–10; Acts 2:25–32; Ephesians 4:9–10; 1 Peter 3:18–19)

9. What does the Creed mean when it affirms that Jesus rose again from the dead?

It means that Jesus was not simply resuscitated; God restored him physically from death to life in his resurrected body, never to die again. His tomb was empty; Jesus had risen bodily from the dead. The risen Jesus was seen by his apostles and hundreds of other witnesses. (Psalm 30:1–5; Luke 24:1–12; John 20:1–18; Acts 1:3; 1 Corinthians 15:3–8)

70. What kind of earthly life did Jesus have after he rose from the dead? Following his resurrection, Jesus spent forty days visiting and teaching his followers. He appeared to his disciples, spoke to them, invited them to touch him and see his scars, and ate with them. (Luke 24:13–49; John 20:19–29; Acts 1:1–8)