Or, you could write 'new' verses to This Is The Way We...

sow our corn, water our corn, hoe our corn, grind our corn, eat our corn.

Or, use a different food in each verse. Grind our corn, mash our taties, snap our beans, etc.

At the end of the project have a banquet/meal using stuff they've learned about? Make tortillas, etc. Invite parents, family.