Too Quiet Moments - Are They Really Suspicious?

At the age of 3, one day the house was too quiet. Wondering what this little one is doing I peeped out of the kitchen and found him applying shampoo from the newly bought bottle all over his body (Later came to know he thought it was a body lotion lol). 

When he was 6, during a summer vacation, on a random morning while I was preparing the breakfast suddenly I felt the house was too quiet again. And this is what he was upto.

At 10, when the interests drift towards mechatronics and has a research station ready in hand