What could the treasure be?

The catechist was giving a lesson centered on Jesus' parable: "The kingdom of heaven is like a man who found a treasure hidden in a field (Mt. 13:44)." Noting that Jesus didn't say what was in that treasure, the catechist posed the question: "I wonder what the treasure could be?" The group of 3-6 year-old children answered in turn: "Gold...A bright shining light...the Word...Yep, the book the Shepherd wrote...The Lord...I know it's Jesus...the Cross...A mustard seed...God's hat!"