Imagination

I'm not sure if I should feel guilty or happy. Adrienne was asking me to play cards with her today, but I really needed to buckle down and get some things done - so I told her I'd play with her tonight. So, later on she told me to look at what she was doing - she said she was playing UNO with her slipper since she had no one else to play with. Should I feel guilty that I didn't play with her? Or should I be happy that she has enough imagination that she is satisfied playing a card game with an inanimate object?