Amazon has the K’NEX Imagine – Click & Construct Value Building Set – 522Piece – 35 Models – Engineering Educational Toy Building Set
522 ASSORTED PIECES – This set comes with 522 classic and micro K’NEX parts and pieces that “click” together, allowing kids to create anything they can imagine
35 different models – the included instruction booklet shows builders how to create 35 unique models with its step-by-step, color-coded instructions. This toy is ideal for kids aged 7+ and up
Convenient storage – storing small plastic toy parts is easy with this plastic storage tub. keep everything together, including loose parts and partially built models
