It's interesting to go out and relax. There are many outdoor activities. Here are some of them.
Swimming. It's easy to find a nice swimming place. Swimming in a river or the sea can be more fun.
Riding bikes together. It's cool and fun on a bike.
Looking for birds and animals. You can read books about animals and see if you can find them.
Playing games outdoors.
Looking at the stars. You can sit on the grass(草坪) and enjoy the beautiful stars when you feel tired. Watch shooting stars(流星) and make a wish.
Dancing in the rain. It isn't always sunny, but you can have fun playing in the rain. But don't go out when there's thunder and lightning(雷和闪电) .
Just relax and enjoy the time. You`re outdoors only a few times a year. Just enjoy it.