One of my first memories is that I got toy plastic tools - screwdriver, hammer etc. and monkey wrench. I knew that real monkey wrench could be adjusted, but the toy has been from one piece of plastic without moving parts. I was extremely disappointed when grown ups explained that to me. I remember being convinced that grown ups are wrong when sitting alone on the floor in my room and trying to make it move. And suddenly it worked. I was able to change jaws distance. It was not smooth but possible. Excited that I was right and grown ups wrong I run to my mom to show her. When I tried to move jaws they did not moved and monkey wrench was one piece of plastic again and still is till today.