YOU NEED 2 OR MORE FRIENDS TO JOIN IN WITH THIS
ALSO YOU'LL NEED AN ADULT TO PREPARE SOMETHING
(ADULTS:- SEE HERE WHAT YOU NEED)
Sit with your friends around a table with the adult so that you can all see the middle of the table.
Have a large piece of paper infront of you and draw a line - this will be a number line but with NO numbers on it yet!
The adult will then show you, for a few seconds a collection of small things, like those in the pictures above.
When you see the things they've chosen to show you, each of you estimate how many there are and put a mark on the number line with your name and number. Maybe like this
Each of your frineds put their estimate down with their name and number where they think it should go on the number line.
The adult then will show you the collection again and empty them out for you all to count - how will you count them?
You can then do the whole thing again will a new different collection of things.