Eager to eat their cookies, siblings Kat and Ari decide to build a time machine, but they soon discover some things are worth waiting for. "Kat and Ari love cookie time. Ever since they were little, they have had cookie time with Grandpa and Biscuit. It's always fun and oh-so delicious! But waiting for the cookies to be ready? Is. So. Difficult. Surely a time machine can speed up the process! What could go wrong?"--Book jacket.
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