This is a great DIY kit for the young builder. There are a lot of great parts for building the 22 machines that have plans that are included. However with the number of parts that are included, the sky is the limit. This kit will provide your young builder and perhaps his father many hours of fun. K'NEX makes a very durable, high quality product and even better it is made in the good old
from the vendor:
22 different simple machine models
3 individual instructions books
Build up to 3 models at the same time
Contains 590+ parts
For ages 8+
If reviewing a product, it may have been received free of charge. That will NEVER have a bearing on my recommendations.