Is it advisable to serve maple syrup for my 13mo? Like on toast or pancake? Which brand is recommended?

You can start using honey instead since LO is above 1 year old, the main concern over honey is actually because it may cause pollen allergy! If you'd like to try out honey, you can start with a type of honey called honeydew honey - it's NOT related to the fruit, but it isn't made from bees coming into contact with pollen/flowers so there's no risk of allergy :)