can be built on top of the roller-coaster tubbing, grey rods, or pushed together yellow connectors. With the perfect wheel width, your Knex train will roll along.
Don't forget about the different size wheels for your train cars. Your Knex train can be small or fairly large depending on how strong your track is. All aboard!
"K'NEX®" and "KID K'NEX®" are trademarks of K'NEX Brands, L.P., which does not endorse, sponsor, or authorize this site.
Visit the official K’NEX website at www.knex.com.