Unfold it to make a soap film. Then start moving your hands away and scoop the air upwards like it's a net. As a result, bubbles of fairly decent size will fly out, twenty to thirty centimeters in diameter, no problem. It all depends on the speed of your hands movement and the elasticity of the detergent in the jar. If you blow big bubbles out of the jar, one piece will not last for a long time, you will need to stock up.
The best children's bubbles are made by the brand Vesyolaya Zateya (Fun Idea). Buy them, use them. Italian-made, bubbles are great, wonderful.
For the same purpose, very good bubble kits are made in Germany by Pustefix, even better are those manufactured by Gazillion, Canada; they are sold, as a rule, in the Detsky Mir chain and in the Metro cash-and-carry. There you can come and buy one liter at once. By the way, you can do anything with Gazillion, the blue one. But it has such a big drawback – it is very bitter. Therefore, try to keep it from getting on lips and eyes of your children, it is very pungent.
For bubble shows, it is quite expensive, but for bubble making at home, it is even more economical. A liter of the Gazillion is now worth, in my opinion, about 350 rubles. There is not a liter inside only 870 ml, but this is a good price, because if you buy jars of Vesyolaya Zateya, it will be about the same. It is obvious that this deteregnt is not suitable for shows, it is very expensive.
Moreover, the Gazillion bubbles are suitable for the show with only medium-size bubbles and for tricks. It's not good for making giant trains and large wands. A 30-cm wand (
Props, 30-cm Wand) is the limit. And after that nothing will work.
This is it for the children's bubbles.