POOF-SLINKY-Slippery Slimes Kit. Make two kinds of gloppy; slippery slimes right at home! Learn about the science of slime with this Slippery Slime activity kit. With this kit you have everything you need to make Sewer Slime; and Flip Flop slime. This kit contains one package of cornstarch; one package of guar gum; one package of borax; one measuring spoon; and instructions. Recommended for ages 8 and up. WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years. Made in USA and Imported.