There is a prayer that Sarah and I learned at church when we served in the preschool ministry. It's a simple prayer that little kids can learn to set a foundation for talking to God before meals. It goes:
"God, Our Father, God, Our Father; Once Again, Once Again; We should ask the blessing, We should ask the blessing; Amen, amen."
Kate sings it a little better than Hannah does and Kate was the only one willing to perform. Every time we say it's time to pray, even before bedtime, they start singing this. Enjoy!