Always been a fan of Tim Bird. They are not easily available in India (though they are easily available in quite a few european countries), I had one as a kid and wanted my son to experience one as well. What's unique about the bird (apart from the cheer and fascination it brings in Children's eyes) is the ease with which you can explain mechanics of flying (and help your kids pronounce ornithopters). A design originally adapted from Leonardo Da Vinci, its a welcome change from the remote control toys that kids play with today! Learning with fun can't get better!!