Chemistry Magic Invisible Test Tube Kit. (All the components are in the kit, in a smaller size than the video demo.) You take a test tube filled with liquid, and a measuring cup also full of a liquid. (It was premixed, so not sure exactly what the liquid was.) When the test tube is lowered into the liquid, all of the test tubes below the liquid line instantly disappeared! (You'll see it in the video below.)
The second kit is the Chemistry Magic Waterproof Wonders. There are two fun projects in this kit. In one of them, you put dry sand on the little plastic spoon and lower it into the water, making sure it goes under the water. Then take the sand out, and it's bone dry! In the second project, dip a fingertip into the special powder, then stick your finger into water. Remove your finger from the water and it too is bone dry. Each kit will be $11.99 and should be available starting July 2018.