Having fresh replacement strings on hand is essential for the professional, serious, or even part-time yo-yo-er. The more skilled you become, and the more complex tricks you are able to perform, the quicker you wear out your strings. Replace them whenever they become worn, broken, or dirty. This official Duncan™ pack contains 5 genuine 100% cotton strings in the assorted colors of the rainbow: red, orange, yellow, green, and blue (only purple is missing)! Get one now so you never have to stop practicing!
Command robotic creations with this cool construction kit!
Is it a demonstration of a scientific law or a work of art?
Cool new Pi tee featuring ultra soft and light blue 100% cotton shirt.
Illuminate both your room and your mind with this ingenious Periodic Table Lamp.
Investigate the most important phenomena in biology, chemistry, and physics by conducting more than 100 fun experiments!
An unconventional ball-tossing, head-catching challenge for 2 players or teams!