On a scale of 1-10, how bad of a person does this make me? 😂

Yesterday, one of the kids I babysit was playing with an alarm thing (I don't really know what it is). Pretty much, if the two pieces are not touching, it sends off this extremely high pitch, loud alarm. He said it was a "pranking toy". I took it away and he threw a fit. I didn't want to listen to it. So today, I'm sitting here waiting for them to get off the bus and I see it sitting on the table. I grabbed that thing and hid it so fast! It is now sitting on top of the fridge. He just went over to the table looking for it and when he couldn't find it, asked if I had seen it. I told him I hadn't and now we are looking all over the place for it, but we're not going to find it 🤷‍♀️