Don't cross contaminate your food, make these DIY color coded cutting boards instead with full tutorial! I really like this idea for Christmas presents but maybe get creative and use something other than a wood burning tool
Homemade Wooden Cutting Board Conditioning Cream - one part bees wax to four parts mineral oil. Put mixture in jar and set into boiling water (off the burner) and stir until melted. Will be gel like when cool.