Clueless dad - help needed

So. I know this will probably get downvoted to the abyss, bur I don't mind. I got a Gen1 Tamagotchi for my daughter, and she is in school right now. The device told me there is a (Jurassic Park) poop near the being. How do I clean it. I tried going through the first button, but nothing resembled a... what should it even resemble?