Babysitting

I am super jealous of my friend G!!! G and her boyfriend S are going on a cruise!

While they are sitting back an relaxing I will be watching her children an keeping up with the house!
Her children are 6 and 10

I will be babysitting for a week.....any suggestions will help!!

What do I do with a 10..6..an 2 year old??

Preferably cheap and fun!!!

Advice please!?!