When I was in kindergarten, we did show and tell. I brought my turtle. He was the best turtle in the world. He could fly, grant wishes, read minds and talk. But my turtle was invisible. He was also picky about who he let near him. If anyone but me tried to touch him he could make their hands go right through him without feeling a thing. It was up to me to tell people about him, and tell people what he wanted.
The other kids didn’t believe he was there. I told them they were making my turtle sad. It started to rain and I told them my turtle did it. I told them the turtle would never let them know he was there if they didn’t believe.
Because how could they ever prove my turtle WASN’T there?
Afterwards, my teacher told me not to bring invisible things to show and tell again.