Joseph Crane held tight to his mother’s hand Thursday morning.The first day of kindergarten was difficult for both him and mom Rachelle.“I’m probably about to cry,” she said, as dropped off her son for his first day at the new Kelly Mill Elementary School. “He’s a little afraid … it’s his first time. He doesn’t know anybody, so I gave him a picture of mom and dad to hold all day long so he can see us.”Kindergartener Mackenzie Wrba may have an easier transition, since big sister Madison can show her the ropes.“It’s great that she has a big sister to help her get into the feel of a new school year and new experience, and if she’s nervous, that she has a big sister to help her,” said their mother, Kim Wrba.