All you'll need for this challenge is a rainy day and yourself! Running around in the rain might seem crazy when you start, but you'll soon be splishing and splashing around like a fish.
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.29 explore a cave
Wonderful wildlife, slimy green weeds, or things that make noises in the dark - who knows what you’ll discover? Caves are perfect places to explore whatever the weather, whether you're looking for caves in sea cliffs, or impressive natural caves inland. Don't forget your torch!
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.42 go swimming in the sea
Is there anything more inviting than the big blue sea on a hot summer day? We look after lots of brilliant beaches all around the UK coastline, so you're sure to find somewhere perfect for a dip.
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.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?
No.43 build a raft
If you want to be the ultimate coastal adventurist, there’s only one thing for it. Gather anything that floats such as driftwood, and then tie it together with string to become the captain of your very own Jolly Roger. Ahoy!
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.