Rebecca L. Grambe's "Digging Canadian History" is for the 3-6 year old age group, and might educate a few of the adults sharing it.Scholastic Canada publishes the "Dear Canada" series for older children. Each book is written as a diary by a fictional girl living through historical times from the expulsion of the Acadians to WWI.
Vicki Cameron's "Shillings" features Colonel By's children involved in a mystery during the building of the Rideau Canal. Jean Rae Baxter's "The Way Lies North" concerns a family of Loyalists in the 1700s.
Why not consider starting a new Canada Day tradition and share history with the youngsters in your life?