When this happened to me on my legacy, I had the toddler play with the xylophone and the babysitter went and sat across the child and played with her, like the parents can do with the kid. By the time the toddler was a child, she had two best friends (that were the two main babysitters) with the relationship status being nearly full! So that was a plus to the eight hours of xylophone playing, two friends without even trying!