Ass you can see there are two different kinds of cells. Animal cells are round, and plant cells are rectangle and have chloroplast.
We used orange jello to be our cell, and then green grapes for chloroplast, and a strawberry for the nucleus. The boys had a great time and it was easy to see the difference in the types of cells.
A couple days after doing this the boys were being really crazy and wild. I asked them why they were acting like animals. They really got what the lesson was about, here is our conversations....
Me: Boys.... why are you acting like animals??!!!
Tommy: But mom... we are animals!
James: Yeah, our cells are round
Tommy: And we don't have chloroplast like plants do.
What do you say to that??? Nothing really... so I gave them apples and sent my little animals outside to play.