5 things to investigate in your paddling pool

The last two days have been so hot in the UK that we’ve had the paddling pool out, which seemed like the perfect time to do some water investigations.

For each mini investigation I asked the children a question and then we discussed what we thought would happen and why.

Will the sun make the water warmer?

My 5 year old though the sun would heat the water up if we left the water in the paddling pool during the hottest part of the day. We didn’t use a thermometer as I didn’t have one to hand, but in retrospect that would have been a good idea.


We found that the water was much warmer if the paddling pool was filled up in the morning and left for a few hours in the sun.

Can you make a boat move?

We used a small plastic boat. Z tried to move it by blowing initially which worked well, but found he could make it move much faster by placing the hosepipe behind it. We had lots of fun making the boat race around the pool.


Will the water level rise if we all sit in the pool?

We decided the water level would rise, but the children couldn’t tell me why. So we tried it, and the water did rise a little bit. Do you know why this is?

Do you think the heavy ball will float?

Everyone though the heavy ball would sink but it floated!

Do you think you will go down the slide faster when it is wet?

I want to point out that in no way am I advocating putting a slide in a paddling pool, but my children love it, and I am always stood close by watching in case anyone slips.

Everyone thought that the water on the slide would make them slide down faster than normal, and they were right! Do you know why?

 Can you think of any other investigations we could have tried?



There are 7 comments

  1. shannonniebuhr

    You’ve tried a sink/float experiment already with “a heavy ball,” and you could continue along those lines with sticks, rocks, etc. Some questions I’m going to address when the South African summer comes along, with our 2 1/2 year old, are: how much food coloring does it take to color the water? Could something like a piece of paper crumpled up stay dry in an upside-down bowl (like a diving bell)? If you take your hand or foot out of the water, does it feel warmer or cooler and why (evaporation)? My blog is at jozikaroo.com, and we’ll post those experiments when the time comes and link back to you!

  2. Carrie

    Oh, some wonderful ideas!! We are just getting some hot weather and I think our pool will be coming out this weekend. Thank you for sharing at Sharing Saturday!!

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