Protecting pumps/meters from splashing water

Does anyone out there have an idea for how to protect the pump and meter from splashing water? Recently, my 12 year old daughter played at a splash pad with her cousins (while with grandparents, not with me) and forgot until it was too late that she was wearing electronic equipment. Thankfully, the pump was okay, but the meter stopped working. It eventually dried out and came back to life, but my daughter learned how important it is to keep her equipment dry. All this did no good when someone at a party surprised her by dumping a bucket of water on her. So now I'm looking for pouches that are waterproof... or something!!