We have a Buster Cube. Katie loves it!! If you have hardwood floors, be prepared for a noisy activity!!
The nipping (when Kate was little) was stopped with a spray bottle and a firm NO along with the water squirt. Soon all we needed was the verbal cue.
Exercise (not easy in our winters, 10 below 0 this morning and a sheet of ice over everything here) and extra play time in the winter are a must. We invent borderline devious hide-and-seek games. Favorite toys hidden under a stack of newspapers, treats behind couches, small box filled with crumpled newspaper and a treat at the bottom, the best is a toy that you can turn on and off the sound so you can hide it, turn it on, and wait until your B finds, treat, then play again.