(See what I did there? Little play on words for my own amusement. I’ll be here all week.)

If you have kids who love all things LEGO and building, chances are excellent that you’ve got some K’NEX sets on your holiday shopping list. Prices are already starting to drop—right now at Amazon, this 618-piece tub is just $20—pretty good—and this 705-piece set is down to just $16.88 (its lowest price ever). Get ’em while they last!