Nice! I had trouble getting the compound scenario to submit at the end. Placing the second brick on the left was forcing it either to disappear or stack on top of the bottom one.
I am so excited about that example that I cannot find the right words! It is way more educational than every chemistry lesson I attended at school. I LOVE this way of teaching/learning! Of course I also love the design, and easter LeggO help made me laugh :)
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