I loved doing this when I was a kid! Mom would let me "paint" the steps, sidewalk, etc. - what fun! Painting with real tools. Paint rollers, paint brushes and even a paint pan. But with water! Take it outside on the driveway and paint it!
Stone Activities for Kids - Happy Hooligans. *Always pack a sharpy and you can draw on rocks "on the go." Or when the kiddos find the ones they wish to use, just whip out the marker and have your kids help draw on the rocks.
Hide numbers throughout house or yard. Children hunt, find and arrange in order before timer rings. You could use this so many ways - larger numbers, equivalent fractions, rounding.Learn Through Movement - Number Hunt Math Game.
How many triangles can you make with 9 sticks? Or older kids, Who can use these 9 sticks to make the most triangles? Kids can reinforce geometry and critical thinking skills through creating various shapes with sticks.