3. What material to improve?
Once the child is no longer afraid to put his head underwater, he must learn to do so head first, then by swimming as long as possible. For this, nothing beats the classic game of "passing between the legs."
So that you can participate as well, and thus make the exercise even funnier, you can use the water arches: Aquaway Diving Game. The larger the arch, the easier it is to pass underneath. And with several arches, your child can try to cover the greatest possible distance.
For it to be even more playful and fun, the immersion aid handles (Ticrawl) Swimming Game, can be really useful. They will allow your child to hold on to the bottom of the water and work on coordination without realizing it, moving forward further and further. He will also be able to see that, without these small suction cups, his body will rise. And yes! The body is floating!!!