Outdoor Math: Fun Activities for Every Season by Emma Adbge (Kids Can Press, 2016) is a helpful book for a parent trying to sneak math into everyday play! It won't even feel like sneaking, because the math games suggested will be fun for preschoolers or lower elementary students.

In sections labeled by season, Outdoor Math suggests ways to practice counting, addition, division, coordinates, mapping, multiplication, shapes subtraction, and even telling the time. The activities use items found in nature, such as acorns, pinecones, and rocks, to do many of the activities. Other activities require watching the animals outside in nature. A few activities suggest using a stopwatch to count what you can do in one minute.

In all, Outdoor Math is just the kind of thing I enjoyed using in my homeschool to give me ideas on making playtime count as school time. That doesn't mean that I was taking away playtime -- just that we found ourselves learning through play. That's the best way to learn!

Some great outdoor activities in this book to promote mathematical thinking in young children. Great to pick up and do an activity no matter what the season is.
The only disappointment is how short the book is.
It does make a useful classroom resource but could do with a little bit more.