hello..i'm supposed to develop a prototype system for my final year project in uni..i've thought of two systems, both web based, to develop:

i. web based help desk
ii. online nanny recruitment system

which one would be a better choice? i have to add enhancements to systems currently available. what enhancements am i able to add to both of these?

which tools and languages should i use?

any suggestions will be appreciated..thanks.