Try a one-hour tutorial from the site below. Select "Grades 6-8" and then select your level "Beginner" or "Comfortable".
Official Hour of Code Activities (AI, Star Wars, Minecraft and much more)
Here are a few of my suggestions from the Hour of Code Site.
Create Your Own Google Logo - Use your creativity and imagination to bring the Google logo to life using Scratch
Made With Code: LED Dress Design- Use code to create a dress with a movable pattern
Khan Academy: Hour of Code Drawing- Learn to draw shapes and more
Khan Academy: Hour of Code Websites - Take a look into what it takes to code a website
Kano - Code a game of Pong
Make Code Arcade - a free, open-source retro 2D game development environment
Blocky Games - Block-based programming lessons for beginners
Pencil Code Gym - Learn programming languages using an editor that lets you work in either blocks or text. Create art, music, games, and stories.
Codesters - Our unique coding environment makes text-based coding easy and accessible for students in middle grades – even those with no block-coding experience.
Scratch - is a free programming language and online community where you can create your own interactive stories, games, and animations.
Micro:Bit - small programmable computer designed for teaching coding and electronics, featuring built-in sensors and LEDs. We have these available in the classroom.
Khan Academy: Learn to Code - Learn how to use the JavaScript language and the ProcessingJS library to create fun drawings and animations.