We learned this by watching a porcupine nimbly climb a tree at the Pueblo Zoo. PZ is a nice change from the Cheyenne Mountain Zoo; it's flat and as Sage says, "they have lots of animals that Cheyenne Mountain Zoo does not have". Some of our favorite were three amazing lions, the red pandas, porcupines, kangaroos, and some really cute goats that were head-butting each other off a perch. Use the buy-one-get-one coupon in the Gold-C book.
After visiting the zoo, we rode our bikes through Rock Canyon on the Front Range Trail. The trails are paved and flat, and the scenery is something I would never have expected. You can find the trailhead using directions to the Nature and Raptor Center in Pueblo, and just go a little further down the road following the signs that say "Coyote's Den on the River". It costs $3.00 for parking because it is part of the Pueblo Reservoir park system.