Our two sons (4 & 2) really enjoyed this. They have been making Zero X and Thunderbird 4 with their Brio ever since. The 4 year old keeps wanting to know what number Thunderbird the "Thunderbird Boys" are in. Mum and Dad loved it too - it took us back to our own childhood. We were both amazed with the quality of the special effects, they stood the test of time well. Story was perhaps a bit slow for today's generation but it was wonderful to have a story that really was family fun. The Cliff Richard and the Shadows dream sequence made us smile!!! Enjoy!