I love to see people making their own entertainment and operating outside the "You must buy this to be happy" mindset. Here are a couple of examples to inspire you.
Konono No 1
These virtuosos of Congolese thumb piano make an incredibly energetic sea of music with the sparest of resources. Check out the microphone carved out of wood in this picture:
These sweet homemade robots give me a warm feeling like "Yes, I could create my own friend." These were featured as part of Make's new craft blog where you can find other great projects such as crocheting hyperbolic space and knit zombies.