So a few weeks ago, I received an invitation to my nephew's 2nd birthday party. And as I was thinking about his upcoming birthday, I was reminded of a dilemma that I encounter annually: I don't know how to shop for boys! I first ran across this issue when we attended Tinkerbell's friend's first birthday party. We went the store all ready to shop, and that's when it hit me. After shopping for girls for so long...I haven't a clue how to shop for boys. Especially toddler boys. It has been recommended to me to look at sites like infantcore.com…