I split Adie and Cassie's toys into three separate bags and change them out, but both of them tend to play with the "toy of the day or week" and not play with anything else.  Adie is going through a tennis ball phase right now.  I took her to pet smart and showed her scads of toys but she chose the little tennis balls to buy. (She spent her own money she earned from babysitting.)  I would never spoil her by purchasing a toy just because she wanted it.  
 
 
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