Just make your normal bike ride a little longer, or choose somewhere nice for a really long ride. You could take your friends with you, or your family and soon you'll have ticked off another challenge from your list.
No.12 make a trail with sticks
Pick up sticks or fallen leaves and lay a trail for your family to follow. Please don’t pick sticks from living plants or trees though.
No.13 make a mud pie
Put on your wellies and find a muddy spot. Stones, leaves and twigs are great for decorating, but remember, a mud pie never tastes as good as it looks.
No.14 dam a stream
You can use all sorts of natural things to try and dam a stream, twigs, branches, stones and rocks. You can also try all sorts of designs, but you'll need to work quickly to stop your dam getting washed away. And when you've built it, local wildlife will be happier if you remember to knock it down afterwards.
No.15 play in the snow
If you're wrapped up warm and in waterproof clothes, there's nothing better than playing in the white stuff from making snow angels to snow men, snowball fights and sledging. Snow makes everything seem magical.
No.16 make a daisy chain
Find some daisies and start making a chain, it's as simple as that! Top tip: daisies with long thick chains are easier to make holes in and make a stronger chain.
No.17 set up a snail race
You'll have to find some snails for this, then just mark out a short track in chalk - don't make it too long though, snails move super slowly. Your racing snails will be happier if the track is somewhere shady, as they don't like being out in the sun! It's best to pop them back where you found them after their race, and wash your own hands too.
No.18 Create some wild art
Woods have pretty much everything you could need to create your very own piece of wild art. You could use leaves, sticks, acorns, mud, grasses, conkers, feathers or anything else you find to make some art.
No.19 play pooh sticks
Pick a stick that you're going to recognise and then get your friends to choose sticks for themselves. You'll need to make sure that you can recognise your own stick so you can tell who is the winner. Throw the sticks off one side of the bridge and cross to the other to see which stick comes out first.
No.20 jump over waves
Beaches serve up a never-ending supply of waves: big or small, all of them are fun to jump over. Who can leap the highest?
Even bold adventurers don't need to go too far from home to tick off challenges from the 50 things activity list. Here are our top ten ideas for activities that you can do in your own back garden, nearest park or outdoor green space.