Need ideas for 40th birthday gifts? Some say they're getting over the hill, others say the 40th birthday is when you really start to appreciate the subtleties in life. Either way, you'll find remarkable 40th birthday gifts from RedBalloon. Try a dinner cruise or hot air ballooning for an enjoyable present. But if you need some 40th gift ideas to help them beat the mid-life crisis, try a day with a classic car, shark diving or hang gliding.