The Truth/Cross Project was made as a witnessing tool to assist in the starting of discussions. The outside of the cross represents sin and bad things that happen which Christ took upon himself so we could have everlasting life. The inside of the cross is self-explanatory and is meant to read out loud.
The white layer represents new life, the red - the need for a Savior. The blue: that we must give everything to God and the inside of the box (yellow) that after this life, eternal life is awaiting us (note the happy people). The cross project was originally make as a high school art project at a public school many years ago.