In both games power-ups are activated by getting a norn to push them. In Creatures 2, they resemble spinning yellow disks, but in Creatures 3 they are blue rectangles.
Many felt that the introduction of power-ups in the series increased the 'adventure' aspect of the games, by forcing players to run around the map and collect objects, while reducing the artificial life aspect. Others simply found it annoying to have to collect things all over again when starting a new world (in C3). For this reason there are a few COBs/agents which activate things for you.
JayD made the Pick Up Pick-ups.cos, which was available for download at SeeYou7.Net. Clucky created the New Pickups which moves all pick-ups to the Norn Terrarium and allows the player to activate them. Arnout created the similar Pick-up Cheat which moves all pick-ups to the Norn Terrarium and allows the player to activate them, and is compatible with his Creatures 3 hard mode extension to the pickup system.