The glycerine slows down evaporation and stops the bubbles from drying out and popping too quickly (evaporation causes bubbles to pop faster). The washing up liquid stabilises the water molecules and allows them to ‘stretch’. This causes the surface tension that allows insects to ‘walk’ on water. The negatively charged hydrogen atoms in one water molecule and the positively charged oxygen atoms in another water molecule attract each other and the water molecules cling together. You can try sticking your hand inside a giant bubble, or using a smaller bubble wand to blow smaller bubbles in to it. Sometimes the wind will blow the bubbles for you without you even having to move, though if it is too windy the bubbles will just pop straight away. You can now blow or carefully walk with the sticks to create bubbles. One the wool/ string is clear of the water and hanging down tangle free, gently pull the stick apart. Gently lift the wand out of the water with the sticks held together and the eyelets pointing inwards. To use your giant bubble wand, submerge it in the bubble mixture and ‘swoosh’ it around a little without creating too much foam, and being careful not to tangle your wool/ string. We picked up some glycerine for this in the baking aisle at Waitrose. ![]() So for a litre of bubble solution that would be 950ml water, 30ml washing up liquid, and 20ml glycerine. They suggest using 95% water, 3% and 2% glycerine. However, to create giant bubbles, you want a solution that creates more stable and long lasting bubbles, so we turned to the recipe that the Science Museum in London uses for their bubbles shows and have kindly shared on their website. For a very basic solution, add a couple tablespoons of good quality washing up liquid to a litre of warm water. Now that we have our wand, we need some bubble solution. The wool/ string creates a triangle, with the washer weighing down the longer piece in the middle. Your should have a bubble wand that looks something like this: Step 5: Repeat with the second eyelet and the other ends of the wool/string – thread the washer on to the longer piece before securing it. Step 4: Now tie the two ‘tails’ together, to stop the second piece slipping down. Step 3: Take the longer piece, and tie one of it to the shorter piece right below where you tied the shorter piece to the eyelet. Step 2: Take the shorter piece of wool/ string and tie one end of it to one of the eyelets, leaving a little bit of a ‘tail’. Step 1: Screw the eyelets in to sides of the sticks, a couple of cm from the end. string, thin rope, or thick wool (we used wool) – you will need one shorter piece, and one longer piece roughly double in length. ![]() As well as being lots of fun, creating bubbles is also a great opportunity to investigate different science concepts with kids.įirst, let’s make a bubble wand. In this week’s science session we are going to be doing something a little different – we are going to make giant bubble wands! I’ve always wanted to try this, and after putting it off every summer this year we finally did it.
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