Set up a big mirror with short passages from the bible stuck around the frame. Each quote should talk about God's love for each one of us as his creation, or what God thinks of us e.g. 'I am fearfully and wonderfully made' (Psalm 139). Ask the group to stand one at a time in front of it and reflect for a while.
In response to the fact that God created us unique with our own identity, create a fingerprint painting. Provide a shallow paint pallet with a few different colours of water-based poster paint or similar. Lie out a massive cross-shaped sheet of paper on the ground and ask the young people to fill the paper with fingerprints and handprints (okay, so this is primary school stuff, but it's still fun for all ages). Don't forget to keep soapy water and towels at the ready!
If you want to discuss the subject of grace, make the point by giving two sweets to those in your group with blue eyes. The others have to jump up and down for 30 seconds in order to get just one sweet. When they complain, explain that a gracious person would of course give sweets to everyone, regardless of what they had or hadn't done, or what they were born with (this is opposite to how the world often treats us in terms of success, looks, etc.). Readdress the balance by giving out more sweets.
Discuss John 4:4-18 and Luke 23: 39-43. Both stories show what happens when Jesus meets ordinary people. He is gracious, loving and kind. He does not look at the sin in people's lives, but at the need in their heart. The woman at the well was invited to drink from his living water, despite the fact that he knew she did not deserve such grace. The criminal on the cross recognised Jesus for who he was, and asked forgiveness. Jesus offered it graciously, despite the crimes of the man. It is important to point out that these people were asked to, or did freely, turn their lives around in response to meeting Jesus.