Widely used by power and telephone companies (and anyone who wants to get a cat out of a tree) this is an excellent model showing levers and hydraulics.
Using a parallel linkage, the platform stays level all the way up and down. And it swivels side to side! Great fun for moving Lego people around, (sorry, not included).
The nice thing about the parallel linkage is that as the platform moves up and down, the people don't fall off (we think that is a nice touch!)
Easy to assemble in less than an hour, this kit uses one hydraulic piston attached to the main arm.
Excavators are big machines that are used to dig holes and move earth, and this model uses the same principles as those used in real situations, except you use water instead of hydraulic fluid. There are many types of excavators and this kit uses a first and third class lever to make the arm and shovel move. We think it provides and excellent example of how we use technology to dig things up. Great for kids to learn about hydraulics, levers and simple machines, and to finish small excavating projects.
This robotic arm is an easy to make 3 dimensional model that grabs, lifts items horizontally, and can turn very close to 90 degrees! Designed to be used alone (with a nice syringe holder), or in a group - each person using one syringe.
A great way to learn about Robotics, Levers and Simple Machines, Fluid dynamics, Engineering, and Invention, and Design and Technology - or just moving things around the house (small things, mind you - no dogs or cats, please.)
Watch the different colored balls roll into motion through the wooden tracks and climax with the wonderful symphony of sounds with the built-in, six-tone xylophone.
The play of colors, sound, and motion will help develop hand-eye-ear coordination.
This German handcrafted Ball Tracker is made with 100% child-friendly materials: high quality wood, nickel-free metal pieces, formaldehyde-free glue, and lead-free paint.
Humans have long held an interest in the bright, colorful crystals we call gemstones. Throughout history, they have been used as decorations, folk remedies, and currency. Readers will discover how gemstones are formed, how they get their incredible colors, and what sets them apart from other minerals.
Inside you will find:
- Why some gemstones are more valuable than others.
- A timeline, photos - and how gemstones are formed.
- Surprising true facts that will shock and amaze you!