These D battery holders can house two D batteries, and you will find they are excellent for use in any hobby or science project. Each holder includes wire leads for easy hook-up. Recommended for electronics applications, science fair projects, and more! Set includes 10 holders.
This advanced physics kit is perfect for older children already versed in physics knowledge!
Build a model car that runs on hydrogen gas using a unique reversible fuel cell!
High-quality green laser pointer projects a green dot up to an incredible 2 miles away.
Comprehensive collection of 30 fossils.
Use this laser pointer for any professional presentation!
Check out this amazing renewable energy science kit featuring the wonders of hydroelectric power!