Macbook Air sliding camera cover

I have always used stickers over my laptop and phone cameras after being in a presentation about online safety and how criminals can easily access cameras. Children are particularly at risk as app developers target children; gaining permission for the use of camera and photo roll! (One particularly bad one was apparently that horrible talking cat thing). PLEASE CHECK WHAT PERMISSIONS ARE REQUIRED ON THE APPS YOUR CHILDREN ARE USING. NEVER NEVER NEVER NEVER LET THEM HAVE THEIR PHONES IN THEIR ROO