The 2017 Holiday Toy Gift Guide The Total Teen CharleneChronicles.com K’NEX Coaster Building Set Brand: K’NEX MSRP: $79.99 Buy: Amazon.com Ages: 9+ Over 430 pieces sets up the thrill of the K’NEX Web Weaver Roller Coaster Building Set. The rods and connectors can be easily joined up for a coaster that stands 2.5 feet high and glows in the dark. The set includes an air-powered battery operated car letting it travel at record speeds for horizontal and vertical thrills. The step-by-step, color-coded instructions are easy to follow or go to knex.com instructions for a second roller coaster model! While the set is fun to build and play with when it is done, they are working on STEAM concepts. Making it even more of a hot toy, all the sets can connect together so kids can create their ultimate roller coaster or theme park!