Activity with Toddler - Magnetic Colour pin

I saw a game with magnetic colour in the toys shop and suddenly I think to buy a magnetic colour pin (I don't know what it called :p) on the stationary store.
A packet consist of 8 pieces with 4 different colour i.e. blue, red, yellow and green.
I brought 5 packet cost you IDR 25.000 (2.5USD), so I got 10 pieces of each colour.

What you need:
- a Magnetic colour pin
- a magnetic whiteboard (or you can play using a paper on the your refrigerator)
The main purpose I brought the white board was to encourage Josh to hold and draw something, but it's can be used as a magnet board also, so that a plus for us having this kind of whiteboard.
- a different colour of whiteboard marker (I get blue, red, yellow and green same with the magnetic colour) cost me around @IDR 9.000 (1USD each marker)

I can used to Learn:
- matching colour/ grouping and create a different shape.
for example: I draw a flower consist of different colour circle and asked Josh to put the magnetic colour pin.
- counting like below activity.

One day Josh make a long caterpillar with the magnetic pin. On the other day, he try to put it everywhere to hang the magnetic pin.

Below is just one activity where I used the magnetic colour pin.

Ok ma, I'm ready to take the challange ^^

Note: video upload where showing the process he put it, failed. will post the link once success ^^.

Update: