To make snail soup you will need:
A couple of old leaves of lettuce, about 60 millilitres of water, and either a fork to mash it or an electronic blender. Please ask a grown up to use the blender if that is what you are using. You need to make sure your soup is quite thick. Snails can drown very easily.
Take a glass or plastic container - it could even be a large jam jar - and paint the inside with the soup. Place your snail gently into the container and watch them munching up their delicious soup. Yum!
Please make sure that you release your snails back into their natural habitat after you have watched them for a while. But if you need to keep them over night, then make sure they have a spacious home with air holes, and some lovely leaves and bits of grass to hide in.