wet play

wet play (countable and uncountable, plural wet plays)

1. (UK, education, uncountable) Structured play activities for young schoolchildren during inclement weather.[1]
   • 2017, Jennifer Killick, Alex Sparrow and the Really Big Stink, Firefly Press:

     It was a rainy day, so at breaktime, we had to stay in for wet play.

   • 2022, “Wet Play | Willow Lane Primary School”, in Willow Lane Community Primary School‎:

     Wet Play poses challenges to the school day. We know that children are happier and more focused on learning if they have time to run around and play outside. Unfortunately, sometimes (and quite often recently) the weather doesn’t allow this. At these times we have ‘Wet Play’.

   You should stay in since it's wet play.

2. (geology, countable) A natural gas formation containing wet gas, meaning it has sizable amounts of liquid alkanes such as ethane, propane, and butane.
   • 2018, Gregory Morris, quoting Josh Adler, “Three Pipes in a Ditch”, in Sourcewater‎:

     In the Delaware there is lots of water, especially brackish and produced. It’s a wet play, but there is very little water infrastructure.