2021 ALASOU 163 Education Engineering and DIY STEM Construction Kit. A Engineering Gift for 6 7 8 9 year old boy and girls This is a flexible set that can be enjoyed by 6 7 8 9 year olds children. The set teaches basic mechanical construction and assembly techniques using threaded fasteners. There are enough parts which can be used in various ways that a creative child can make self-designed devices beyond the five vehicle designs in the manual. The relatively large parts and fasteners are easy for smaller children to use (as compared to the small metal parts).