I came across this site while searching for ideas for outdoor activities for my school. I missed my childhood years. I'm just sharing with you guys just in case you're out of ideas what to do with your little ones. :)
Head to the coast for a rockpool treasure hunt and a spot of beachcombing.
Climb a tree.
Throw a frisbee.
Spend time together on an evening family walk or ride.
Fill a tub or a paddle pool for some water play.
Paint a fence or a window.
Head to a National Park for a bushwalk.
Grab a magnifying glass and hunt for bugs!
Swing your hips in a hula hoop.
Get busy in the garden and pull some weeds or plant some vegetables.
Play a game of chasey or hide and seek.
Try catching dinner with a spot of fishing.
Draw a hopscotch grid with chalk on the pavement and get jumping.
Scramble up a hill. And roll back down again.
Bounce on a space hopper, pogo stick or trampoline.
Build a blanket cubby house and ‘camp’ at home.
Throw or kick a ball around.
Set up an obstacle course in your back yard.
Pop on some gumboots and jump in puddles.
Head to the park and fly up high on a swing. Adults too.
Have a game of marbles.
Take your percussion instruments outdoors and have a sing along. Or form a marching band.