Those are some very nice toys Ron, great work!
Any finish sold in North America is non toxic once cured, as long as it is designed as a finish. Products like orange oil and lemon oil are designed as cleaners and polishes and may contain toxic ingredients.
If I was finishing those great toys, I would soak them in a 50/50 mixture of boiled linseed oil and mineral spirits. Wipe them off with a clean soft cloth, then let them dry for twenty four to thirty six hours. Then topcoat them with Deft semi gloss spray lacquer.
Again, once fully cured, the finish will be no toxic.
P.S. Happy New Year to you too!