Lidl had some great science books in last week for £1.50 each. We made a trip specifically to get them and bumped into my mum, who had also spotted the books and popped some into her basket for us! There are ten experiments in each book using readily available household items.
We have a vase of poppies on our dining room table at the moment. This morning Tabitha decided to use the fallen petals as boats in the sink. Aaron asked me to make an origami boat, which I did with some difficulty!
As they were already talking about floating and sinking, I thought it would be an ideal opportunity to do the first experiment from the air and water book. We discussed hypotheses and Aaron predicted what would happen to each material. This was a great chance to sneak in some writing without him even noticing! He wasn’t very sure about the balloon initially, but as soon as he saw me blowing one up he changed his prediction to float instead of sink.
The table got very wet as we learnt about displacement!
We talked about the two opposing forces involved, the weight of the object and the upthrust of the water.
We discovered that a ball of modelling clay will sink, but the same piece will float when moulded into a boat shape because the weight is spread out.
Aaron and Tabitha loved adding balls of modelling clay to their boats until eventually the weight was greater than the upthrust and their boats sank to the bottom!
We also got some cheap and cheerful science kits from Lidl. I was not expecting the quality to be great and it’s not, but Aaron likes them anyway. I discovered that he can name the planets in order much faster than I can. I have to go through “my-very-easy-method” in my head, while he just rattles them off effortlessly!
We spent this evening assembling the planetarium and it’s actually rather good. The moon orbits the earth and the earth spins on its axis whilst orbiting the sun in an ellipse (although the sun is at the centre rather than the focus). It shows the seasons, including the solstices and equinoxes, and the phases of the moon. The booklet that came with the set contains lots of information and demonstrations using the planetarium, so I think we’ll get plenty of use out of it.