Mummy's very good at cooking, uh which is also quite science-y. And Daddy's good at like, knowing like facts. LAUGHTER So I think they're both gonna-- I think they're both gonna be very good.

Yeah, alright. We'll go with that. Bicarbonate of soda, here we go. Let's see how we go here, mate.You fill the plastic bottle three quarters full with water and a few drops of INTERRUPTION washing-up liquid.

When the three skewers meet at the top, use a bag tie to tie all three skewers together close to their ends.

I always think, well I think that mum is very good at science, but maybe she'll make a couple of mistakes that will ruin the experiment. That doesn't make any sense to me, what you've just said, but I'll--I'll--, again, I'll take your word for it, mate. Want to use this kit for a science fair project? See our experiment ideas below to get you started.