Use this handy and versatile water quality testing device to monitor pH levels, temperature in Celsius or Farenheit, or electrical conductivity, which allows you to gauge the adjustment of nutrients, salts, and other elements for healthy plant growth. Excellent for hydroponic gardening or experiments in the classroom. LCD screen gives precise measurements to the hundreth decimal point.
Find the hidden crystals when you open your own geodes from this fun set.
A cool kit that helps you build your very own robotic arm!
A combination of three of our great discovery toys, all in one package!
This glass Erlenmeyer mug makes an excellent gift!
Learn about hydrogen fuel cells with this incredible kit!
This simple but amusing magnetic toy will keep you busy for hours!