https://www.50things.org.uk/
Just a few of the things on the list:
1.Climb a tree
Make sure there is nothing under the tree which could hurt you in the event of a fall
Don't climb on windy or wet day
Read more about tree climbing here.
2. Roll down a really big hill
Use hills with gentle slope
Avoid areas recently occupied by livestock
3. Camp out in the wild
Read more about wild camping here
4. Build a den
Download a PDF about building a den safely here (PDF/ 448KB)
7. Fly a kite
Read more about flying your kite safely
8. Catch a fish with a net
Be gentle when fishing with a net
Always put the fish back quickly in the water
Keep cuts and wounds covered with waterproof plasters
Get more pond safety advice.
9. Eat an apple straight from a tree
Give the apple a wash before eating it and look out for maggot holes
Ask the owner of the tree for permission beforehand
10. Play conkers
Help prepare the conker for your child.
If you drill the hole with a power drill it means the conker is less likely to split when playing and is safer than making a hole with a sharp object