Terrible Twos

Ariyana is almost 2 1/2 years old and overall she really is a sweet, happy, and well behaved child. But, occasionally she displays qualities commonly referred  to as "terrible twos!"
I broke down and bought a book on this topic thinking any advice and help on this would be welcome. After reviewing some potential books on Amazon, I settled on the book Making the "Terrible" Twos Terrific.  Let's see if this book gives me any insight into the Toddler Mind.

Here she is refusing to get off the bike

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But now she is all happy and fine 1 minute later. I think maybe my husband bribed her with Kit Kat or as Ariyana would say "Kick Kack"