This is how I exploited the use of Blackberry playbook :):
To ensure she will be occupied when traveling so that mummy can doze off for a while (or more time for FBing).
To entertain herself while mummy busy with house chores (or FBing again).
To ensure she would be obedient and finish her meal faster so that mummy can clear all the dishes in the sink (or again more time for FB).
To put her to sleep so that mummy can finish off ironing and what nots (or of course, FBing). ;P