All kinds of small objects that can be put into the bottle
List of items to check (objects you put in the bottle)
Steps
First, place all the objects on the table.
Give each child 1 bottle.
Ask the children to put all the objects in their bottle and then fill it with rice, making sure they leave enough space for the rice to move and the items to be seen.
The principle of the spy bottle is to try to see all the objects by moving the bottle.