Laravel Migrations Run With No Error But Integer Field Is Not Created

I'm trying to migrate a migration file. Some integer fields triggered an error:

$table->integer('age',11)->default('0');

There were a few of those. After reading other posts, and trying a few things, I changed it to:

$table->integer('age',11)->default(0)->change();

This time, no error raised, but the created table miss and those fields!

Please find the whole file below:

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateReservationAnniversairesTable extends Migration
{
    public function up()
    {
        Schema::create('reservation_anniversaires', function (Blueprint $table) {

        $table->increments('id',11);
        $table->string('nom',50)->nullable()->default('NULL');
        $table->string('gsm',30)->nullable()->default('NULL');
        $table->string('prenom',50)->nullable()->default('NULL');
        $table->string('email',100);
        $table->integer('age',11)->default(0)->change();
        $table->time('heure_debut');
        $table->time('heure_fin');
        $table->string('gateau',100)->nullable()->default('NULL');
        $table->string('impression',100)->nullable()->default('NULL');
        $table->integer('nbre_enfants',11)->default(0)->change();
        $table->integer('acompte',11)->default(0)->change();
        $table->text('remarques');
        $table->tinyInteger('salle',4)->default(0)->change();
        $table->time('heure_gouter');
        $table->date('date');
        $table->string('formule',50)->nullable()->default('NULL');
        $table->integer('actif',11)->default(1)->change();
        $table->string('couleur',30)->nullable()->default('NULL');
        $table->integer('rappel',11)->default(0)->change();
        $table->integer('confirm',11)->default(0)->change();
        $table->integer('pizzas',11)->default(0)->change();
        $table->integer('sandwiches',11)->default(0)->change();
        $table->string('options')->nullable()->default('NULL');
        $table->integer('annif_confirme',11)->default(0)->change();
        $table->string('created',30);
        $table->string('modified',30);
        $table->tinyInteger('confirm_enfants',1)->default(0)->change();
        $table->tinyInteger('invitations',1)->default(0)->change();
        $table->string('adresse')->nullable()->default('NULL');
        $table->integer('invitsEnvoyees',11)->default(0)->change();
        $table->float('paiement')->default(0)->change();
        $table->string('paiement_methode',50)->nullable()->default('NULL');
        $table->integer('enfants_presents',11)->default(0)->change();
        $table->integer('parts_gateau',11)->default(0)->change();
        $table->float('options_montant')->default(0)->change();
        $table->string('deco_salle',50)->nullable()->default('NULL');
        $table->string('formule_theme',50)->nullable()->default('NULL');
        $table->string('photos',50)->nullable()->default('NULL');
        $table->string('grimage',50)->nullable()->default('NULL');
        $table->string('clown',50)->nullable()->default('NULL');
        $table->string('sculpture',50)->nullable()->default('NULL');

        });
    }

    public function down()
    {
        Schema::dropIfExists('reservation_anniversaires');
    }
}

You can't set length, but you can use different types of integer:

$table->bigInteger()
$table->mediumInteger()
$table->integer()
$table->smallInteger()
$table->tinyInteger()

You can check documentation as well.