The National Trust has drawn up a list of 50 activities that children should have tried out by the age of 11 and three-quarters.
It is hoped by completing the rundown, kids will spend more of their free time outdoors enjoying the natural scenery that surrounds them.
Among the experiences that youngsters need to clock up are climbing a tree, building a den, camping out in the wild and flying a kite.
However, there are also a few off-the-wall suggestions, such as visiting an island, tracking wild animals and calling an owl.
In order to help kids learn more about the list, a team of elite rangers has been put together by the National Trust.
Tony Berry, Visitor Experience Director, noted the group is a "fantastic bunch, with bags of enthusiasm for the outdoors and what it can offer kids".
"We're hoping that the nation's children will embrace the 50 things and start having their very own outdoor adventures with their family," he added.