Thanks to my dad for this idea. He suggested that I tried doing something with sonar as it neatly illustrates the principle behind radar. There is so much that children can learn from projects around this. I'd love to have time to get the eye to recognise objects of different sizes and compose a complete piece of music,,,
You can make this with a single Wedo set and Scratch.
Click to see the Scratch cheat codes. It's always more fun to figure it out yourself!