What's a simple, safe homemade anti-mold solution that I can spray on my child's toys that were in the basement?

I’m looking for something I can mix up at home, that’s not unsafe for the little boy, that I can spray on his Thomas the Train wood toys to get rid of what I suspect is either mold or maybe even just dust. It’s been in the basement for a year and I don’t see any visible mold on it, but we sneeze when we sit at the train table. We just brought it up from the basement this week. I’d rather not throw the thing away. Vinegar? Baking soda? Ammonia? Thanks for any suggestions!