I'll check your pics out later (stupid bosses are in today and so I'm stealth mumsnetting) stealth.
Wellthats - OK.
Activities. I would FORGET crafty stuff completely. Put it out of your mind!
Games - Is 7 too old for pass the parcel type games? (I can't remember) I give instructions further up thread about our Halloween version of this game - but in short, hollow out a small pumpkin, leave it to dry out for a few days, stuff with little bags of sweets/small toys (those packs you can buy for party bags - cheap in Wilkinson's for example or the pound shop!). Pop the "lid" back on and play PTP in the usual way except when the music stops they get to open the pumpkin and pick a "prize"
Bobbing Apples - best tip is to make this the last game of the party. Get a couple of bags of apples (whichever is on offer), fill a large waship up bowl with TEPID water, have plenty of towels to hand and plastic covering for floor/table and let them at it. In our house this game lasts a STUPID amount of time!
Nelson's Eye - FAVOURITE game EVER! Make up a small amount of jelly (If you're making Jelly for the party - which you totally should do BTW, I'll give you some ideas on that a bit later - just siphon a bit off) You will also need:
A Person to be Nelson (a grown up)
Blindfold
Chair
"Sling" (we use a tea towel)
So get the kids into a separate room (we line them up in the hall) and put the sling onto "Nelson"
Get the first child blindfolded and lead them into the room. Take their hand and run it along "Nelson's" arm saying "This is Nelson's good arm"
Then run it along the arm with the sling saying "This is nelson's bad arm"
Then run their hand down the BOTTOM HALF OF THE PERSON'S LEG! Saying "This is nelson's good leg"
(by now the kids are squirming
)
Take the childs hand and run it gently across Nelson's Eyelid saying "This is Nelson's good eye"
then get Nelso to hold up the little pot of jelly, take the childs fingers and plunge it into the jelly saying "This is Nelson's BAD EYE!"
MWAHAHAHAH!
The first year I had to explain who Nelson was to the children, but this also eats up 5 minutes of time 
Mega post.
The mummy game (split into teams, make one child the mummy and give the rest a roll of toilet tissue to wrap the mummy up in first team to the end of the roll wins)
um, I'll come back with some more later