Here 
1. Prompt Engineering
gandalf.lakera.ai
2. Prompt Training (Visual)
promptchallenge.com
3. Prompt Engineering (Free Game)
cotera.co/learn
4. Neural Networks
playground.tensorflow.org
5. AI Fundamentals (like Duolingo for AI)
elementsofai.com
6. Train Your Own AI Model
machinelearningforkids.co.uk
7. Image AI Intuition
artsandculture.google.com/experiment/say-what-you-see
8. Reinforcement Learning
huggingface.co/learn/ml-games-course

1. Prompt Engineering
gandalf.lakera.ai
2. Prompt Training (Visual)
promptchallenge.com
3. Prompt Engineering (Free Game)
cotera.co/learn
4. Neural Networks
playground.tensorflow.org
5. AI Fundamentals (like Duolingo for AI)
elementsofai.com
6. Train Your Own AI Model
machinelearningforkids.co.uk
7. Image AI Intuition
artsandculture.google.com/experiment/say-what-you-see
8. Reinforcement Learning
huggingface.co/learn/ml-games-course