Testers first reaction to K’NEX’s Big Air Ball Tower was universally one of quivering excitement and outright awe, and why not. This new construction set from K’NEX is so big, so colorful and so full of movement and activity that the first look stops you in your tracks. At over five feet tall, big is an understatement. The task of assembling can also appear daunting but once you start connecting the rods and connectors a familiar, almost zen-like peace settles in (at least that’s what experienced builders told us). The final product doesn’t disappoint. The highlight is the colorful balls shooting up through the clear tubes to the top where they begin their exciting decent. The Tower is great to play with and totally awesome to show off.