First Grade Maths may just be the beginning, but it's the most crucial stage as this is the foundation of your children's future. If they take a liking to Maths today, then they'd do really well even in the higher classes - because, interest is the spark to all learning processes.
Kids aren't under any stress at this age and therefore, they could easily grasp knowledge through fan and game. Anything that's enjoyed is easy to remember and hence they'll grasp the concepts easily.
This article has a list of various things that you could do to make this learning curve more of an adventure rather than a chore. Take a look at some of the best workbooks, online games, Android games as well as free math games that you could play with your kids.
If you've got any ideas for more Cool Math games, do leave a comment
Learning through games is a good idea.
Oh thanks for the addition of Tux Math, I love Maths and always loved it :)
Thanks for the detailed comment and it's nice to know that you teach your students Maths as well.
Learning math is very important because solid base in math will give you confidence for all natural sciences (so called hard sciences) and also support your thinking skill for understanding all other (e.g. social) sciences.
When I was working as substitute chemistry teacher I always repeated: math is your best friend, it never lies, you can always count on it, it will work the same wherever you go and we spend about half of time in class just for math (this includes logic), the rest was mostly experiments.
I agree, math for first graders should be fun and if I may add another interesting game (it is free and open source) for learning math: Tux Math.
It is easy, it is fun and it works:)