Get this book and do some of the activities in it, there's enough that it should last for the next 5 or so years too. https://www.amazon.com/Science-source-fas

Get this book and do some of the activities in it, there's enough that it should last for the next 5 or so years too. https://www.amazon.com/Science-source-fascinating-projects-activities/dp/0590740709 https://www.amazon.com/Science-source-fascinating-projects-a... I had a copy given to me by a teacher when I was 7, and I think with parental guidance you could do some of the activities with toddlers.