Water Marbles 2 Color Liquid Motion Timer is a great visualization aid to show how water and oil don't mix. It's full of zigzagging, liquid motion fun. Turn this desk toy over and watch the 2 colored liquid drops make their way down the zig zag steps all the way to the bottom.
When I opened the box of my nice Toysmith 3192 Bubble Motion Tumbler I was surprised. Everything from 123Greetings.com come in secured packages.