This is the 121-piece building kit that has giant-sized pieces for children who like to build and want to create large-scale vehicles, structures, and objects. The brightly-colored kit comes with an instruction manual that shows how to build 69 different models, including a bi-plane, crocodile, helicopter, race car, steam engine, and more. The pieces connect with a twist motion similar to the way traditional bottle caps work, making it easy for small hands to assemble large projects. Includes a special wrench to tighten the twist caps, and the durable plastic pieces wipe clean with a damp cloth. Ages 3 and up.