The Creature Power Suits are designed to activate when Martin/Chris physically touches an animal with the disc containing the power suit discs. They then activate by Martin/Chris saying, "Activate Creature Power Suits!"
The buttons are designed to look like paws, a common symbol for the animal kingdom. When the suits are activated, the sole of the paw shows a symbol of the animal,much like the ones on the Creature Power Discs. As shown on multiple episodes, each little "finger" activates a unique feature to the suits inspired by the specific animal the Kratt brothers touched.
The suits are rather fragile and can sometimes malfunction, as shown on some episodes. In Ker-Honk, the suits would not turn off because of mud stuck in the hardware system. In Tazzy Chris, Chris's suit malfunctioned when a Tasmanian devil bit the activation button, causing Chris to uncontrollably go back and forth between full human and half-Tasmanian devil. On Honey Seekers, Chris's honey badger suit malfunctioned when Chef Gaston Gourmand threw some of his dough onto the activation button. Aviva aparrently did not food-proof the honey badger Power Disc and Chris could not activate the honey badger powers..
The power suits seem to have a rather mutation effect on other animals, as shown in the episode Octopus Wildkratticus.