Kidō is like magic spells that people in the world of anime, like in the show Bleach, use to do cool things. Just like in Harry Potter when they say spells like "Expelliarmus!" to make things happen, in the world of Bleach, people use kidō spells to do cool stuff.
But kidō isn't just about saying magic words. It's also about using a special energy called reiryoku that comes from your body to make the spell happen. It's like when you blow up a balloon, your breath is the energy that fills it up.
People who are really good at kidō can even use it to control other people or even the elements like fire and water. But it takes a lot of practice and skill to do it.
So, kidō is magic spells that use energy from your body to make things happen in the world of Bleach. It's like Harry Potter, but instead of wands, they use their own energy to do cool stuff like controlling fire and making things disappear.