Why was Tony rifling through my backpack?

Jenny and Tony meet me right after I finished work last night.  Jenny told me that Tony had acted strangely.  She wanted to buy him a yellow pickup truck toy but he wasn't interested.  So Tony went away from a toy store without having a toy bought for him and wasn't upset about it.  Or so it seemed.

Jenny, Tony, and I then took the bus home.  As soon as we got home, Tony was looking in my backpack.  He was asking where the yellow pickup truck was.  We told him that we hadn't bought for him.  But he insisted on continuing to look in my backpack.  And he became quite upset when he couldn't find anything.

Strange.