What is a colloid ? A colloid is a mixture is two or more substances mixed together but not chemically combined ( they can be separated ). They are a special type of mixture where tiny particles of one substance are scattered through another substance. Cream is a colloid as it’s made up of tiny particles…
What is a Pulley? A pulley is made from one or more wheels with a rope looped over to make it easier to lift objects. The more wheels the pulley has, the easier it is to lift the load. We designed a very simple pulley system inside a cardboard box, but you could make yours…
Do you know you can make frost appear on the surface of a metal can using just ice, water and salt? We used the power of science to make our very own Frosty the Snowman! This is a brilliant winter science experiment and can be decorated however you want. My children LOVED watching the frost…
I’m not the biggest fan of fireworks, but they do inspire lots of lovely craft, science and activity ideas, so I’ve put together a collection of my favourite easy firework crafts for you. First, up is a classic firework in a jar. This is great for learning about density and how oil and water don’t…
If you need a last-minute creepy addition to your Halloween costume, we’ve got just the thing: fake blood! It looks great, and you probably have everything you need for our fake blood recipe already in the kitchen, so you don’t even need to go shopping. This activity is also found in my book Gross Science!…
It’s almost Halloween, which means we’re in crazy spooky activity mode. I wasn’t sure I’d have time to post much new content this year, but a couple of easy ideas popped into my head, and I couldn’t resist trying them out. Did you see my spider drawing robot? We’ve built circuits for small light-up houses…
As Halloween is approaching we thought a spider themed drawing robot would be fun to make. These are great fun to design and build and very satisfying to watch as they draw circles all over a page. The movement of the drawing robot can be unpredictable so an interesting extension challenge is to work out…
Are you planning a Halloween party this year? If so, we’ve got lots of fun and easy Halloween party ideas and games to keep guests of all ages entertained for hours. Don’t forget to test your knowledge of all things Halloween with my FREE Halloween Science Quiz, too! Halloween Party Decorations First, why not decorate…
Just before Christmas the lovely people at DUPLO sent us a box of bricks and some challenge ideas. If you read Science Sparks regularly you’ll know that we LOVE LEGO and DUPLO and use both frequently in our activities. If you look carefully at the photos below you’ll notice some of our bricks have numbers…
I still remember learning about osmosis at school many years ago. I don’t know why that particular memory has stayed with me so strongly, maybe because it was hard to understand. Whatever the reason, osmosis is a term I’ve never forgotten the meaning of. Definition of Osmosis Osmosis is the net movement of water molecules…
End of content
End of content