Build clay blood cells

Mix the corn flour, bicarbonate of soda and water in a saucepan. Cook at medium heat (with an adult supervising!) for five to ten minutes. Make sure that you're careful with the hot pan and the mixture.

Transfer the mixture into a bowl and cover it with a damp cloth. Let it cool down until it's not too hot to handle.

There are four different shapes that you'll be making - a red blood cell, a white blood cell, a platelet and a malaria parasite.

• For the red blood cell, roll a piece of the dough into a ball, and then flatten it in the middle to create a disk with a dip on each side. Use Laura's video to see what it should look like!
• For the white blood cell, roll a piece of the dough into a ball, and then pinch it to create small spikes all over the surface. Tweezers or scissors might help, but make sure to do this bit with an adult supervising.
• For the platelets, make a smaller piece of dough and roll it into a ball again. Flatten it into a disk and add small spikes all around the outside.
• For the malaria parasite, roll a piece of the dough into a ball. Pinch one of the ends and rotate the dough. 
• For all the blood cell and malaria shapes, don't forget to add a hole if you want to turn it into a key ring or bracelet!

You can store any leftover dough in an airtight container and use it again.

You can use paint, or even nail varnish and marker pens.

You can use the cells to make a key ring, bracelet, badge, magnet, or anything else you can think of. Or you can just keep them as they are!