I am happy to share some excerpts: 

This is a story about Tikkun Olam, the act of trying to make the world a better place. Though the illustrations convey the fact that Jenny attends a Hebrew day school, she lives in a diverse community, and children of all backgrounds will relate to her predicament and benefit from the universal lessons imparted. “Your every ounce was made to bounce!” says Jenny’s grandma when she notices how forlorn the little girl has become, trying to squelch her perpetual jumping. It’s true that her constant motion has been interfering with life at school and at home, but suppressing her nature is not a good solution. Fortunately, Jenny’s teacher believes in community service and organizes a fundraising project to assist a needy school in Uganda. Jenny commits to a jumpathon, collecting pledge money for each jump. She simultaneously reaches her goal of 1000 jumps and helps fund computers and books…. With its bright, child-friendly cartoonlike illustrations, the book succeeds in reminding children to recognize their own gifts and to remember to give to others.–Gloria Koster, West School, New Canaan, CT
School Library Journal
A little girl channels her exuberance and excessive pogo-stick jumping into a worthy fundraising venture.

…Bari’s story of one girl’s approach to the Jewish principle of “tikkun olam” (literally, “repair the world”) will resonate as readers watch Jenny achieve her exhausting, triumphant success. (author’s note) (Picture book. 5-8)
Kirkus Reviews

This is a heartwarming story about Jumping Jenny who uses her “skills” to help out a good cause. Everyone has special skills, even if they aren’t appreciated by everyone as Jenny soon found out. Her passion for jumping did eventually enable her “to make a difference in the world.” The purpose of this book is to encourage children to do just that and Jenny’s attempt to raise money involved challenging herself to jump 1,000 times on her pogo stick. In the author’s note she briefly encourages children to participate in Tikkum Olam, which means “world repair,” to make a difference by helping those around us.
-Deb Fowler
Feathered Quill Book Reviews

Faced with the task of reviewing five new kids books, I sat down with a children’s literature expert: my 5-year-old daughter, Maya. …The last book was “Jumping Jenny” by Ellen Bari and illustrated by Raquel Garcia Macia, which is meant to encourage every reader to make a difference in the world.

Maya said, “It’s my favorite. I’m going to read it again at nighttime.”

When a book graduates from the overflowing shelves downstairs to the select few in her bedroom then you know it’s special.
-Steven Friedman
Jweekly.com Covering the SFJewish Bay Area