Magic Balloon - We blew up a balloon using a bottle water and an effervescent tablet.
Density Experiment - We looked at different liquids and created a potion jar. We used treacle, golden syrup, water mixed with some red food colouirng and some oil. We could see the way each liquid settled. It looked like a potion.
Spooky Messages - We drew a picture using using cotton buds, baking soda and water. Then we painted over it using turmeric mixed with rubbing alcohol (the best one for this is very liquidly hand sanitiser - the gel will work but it's not as good. Warning - turmeric will stain everything so wear gloves and protect surfaces.
Witch's Potion - We used baking soda and food colouring in a small container. When vinegar was added it made a big fizz! We loved this and must have done it 6 times.