When I was approx 8 years old, I got an electric plastic non-remote speedboat. It was powered by a small electric engine and one 1.5V AA battery. It would go around our small round pool in approx 30 seconds. That was fun for a while.
At age 12 I took it out of the cupboard, I found 2 more AA batteries, taped them to the boat, taped wires so I now had three batteries in series (and more weight). It was faster. I felt like a magician...
It evolved, more batteries, more speed. My dad tought me to solder, better than tape, and I spent some money buying big flat 4.5V batteries. I ended up around 20V of power, now it was very fast, including a small rooster tail.
Strangely enough the engine never broke.
Since then I've never been satisfied with current performance...
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