Spend endless hours creating adventurous designs from the Wedgits Explorer Set. This 125-piece set of Wedgit building blocks offers creative opportunities to build designs that look like they should fly beyond our solar system, land on distant planets, and most importantly, help kids explore the outer-reaches of their imagination. Included is a hands-on instruction guide that offers "Wedging Tips & Techniques", and step-by-step instructions on "How to Build the X-Orbiter". Numerous other design structures are pictured in the Product Design Booklet. A unique feature is the use of glow-in-the-dark material in all of the octahedral parts, so you can see your design glow when its time for bed!