When the ninja craze fade out at the end of the 80's, Joseph Lai's IFD produced a trilogy of action movies for kids titled Thunder Kids ( aka Thunder ninja kids) that emulates the famous taiwanese saga of the Kung Fu Kids. Lai bought some korean movies of that style & inserted new shot scenes as he did with the ninja movies. The result was quite funny & interested.
The first chapter of this saga was Thunder kids Golden adventure directed by Charles Lee Chiu & starred by Jonathan Isgar who created a very special, lovely but hateful Old Mel. A very greedy grandpa trying to get rich any cost & assisted by his son played by Ken Goodman.
Once again, someone has uploaded this movie to Youtube. I don't know if this is legal or not since this movie is copyrighted by IFD. But if you want to be introduced in Joseph Lai's Children world, this movie is a perfect example, besides we can enjoy the chamaleonic acting skills of the great Jonathan Isgar.