Babysitting help?! please!?

oh man i know how you feel. my cousin was like that.come early, like 20 minutes before the mom leaves if you can (ask the mom first lol) just get him involved in a game or toy, building blocks, play doh, anything he has before she leaves and have him give her a kiss goodbye. trust me, kids get so into things they won't even pay attention. and move him right from one activity to another, kids that age like the sprinkler, blocks, tv, and hide and seek :)