Birthday Party with Lisa

How old is the little puppy now? Nothing is left to chance at a birthday party with Lisa. After all, she wants her cute roommate to realize how much she loves it. That’s why she got him everything it likes best: a tasty dog bone to gnaw on and a big water ball. They are going to romp around with it straight away. But first Lisa gives the puppy her present. I wonder what’s inside the box?