Never buy another D battery again with this handy AA to D battery converter! Just place two AA batteries plus side down in the plastic casing, and the unit will operate at the same voltage output (1.5V) as one D battery. Great to have around the home, office, or lab. Measures 2.25" x 1.25" x 1.15".
This SUPER Erector Construction set is one of the best you'll find anywhere!
This glass Erlenmeyer mug makes an excellent gift!
Build a model car that runs on hydrogen gas using a unique reversible fuel cell!
Defy gravity with this cool balancing eagle!
Cool new Pi tee featuring ultra soft and light blue 100% cotton shirt.
A cool kit that helps you build your very own robotic arm!