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!
Working model representing the sun, earth, and moon and their relationships.
Discover how solar cells make electricity with this awesome kit!
This classic desk toy will keep you amused!
This is a great clean heat demonstration model for the classroom setting!
Get one of the craziest and coolest kaleidoscopes around!
Illuminate both your room and your mind with this ingenious Periodic Table Lamp.
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